Under room temperature where [tex]\text{pK}_w = 14[/tex]:
3.) (A), (B), and (E).
4.) (D).
5.) (B).
ExplanationWhat makes a buffer solution? For a solution to be a buffer, it needs to contain large amounts of a weak acid and its conjugate base ion. Alternatively, the solution may contain large amounts of a weak base and its conjugate acid ion.
Not every one of the five solutions is a buffer solution.
(A)Ethanoic acid CH₃COOH (a.k.a. acetic acid) is a weak acid. pKa = 4.756. CH₃COONa is a salt. It dissolves to produce CH₃COO⁻, which is the conjugate base ion of CH₃COOH. The solution in (A) contains equal number of CH₃COOH and CH₃COO⁻, both at 1.0 M.
Refer to the Henderson-Hasselbalch equation for buffers of weak acids.
[tex]\displaystyle \text{pH} = \text{pK}_a + \log{\frac{[\text{Conjugate Ion}]}{[\text{Weak Acid}]}}[/tex].
[tex]\displaystyle \log{\frac{[\text{Conjugate Ion}]}{[\text{Weak Acid}]}} =\ln{1} = 0[/tex].
The pH of the solution in (A) will be the same as the pKa of CH₃COOH. pH = 4.746.
(B)Consider the hydrogen halides:
HF: weak acid.HCl: strong acid.HBr: strong acid.The radius of halogen atoms increases down the group, and hydrogen-halogen bond becomes weaker. It becomes easier for water to break those bonds. As a result, the strength of hydrogen halides increases down the group. HF is the only weak acid among the common hydrogen halides.
Mixing HBr and KBr at equal ratio will be similar to mixing HCl and KCl at the same ratio. All HBr in the solution breaks down into H⁺ and Br⁻. The pH of the solution will depend only on the concentration of HBr.
[tex]\displaystyle [\text{H}^{+}] = [\text{HBr}] \\\phantom{[\text{H}^{+}]}= \frac{n}{V} \\\phantom{[\text{H}^{+}]}= \frac{c(\text{HBr})\cdot V(\text{HBr})}{V(\text{HBr})+V(\text{KBr})}\\\phantom{[\text{H}^{+}]}=\frac{0.100\;\text{L}\times 1.0\;\text{mol}\cdot\text{L}^{-1}}{0.100\;\text{L}+0.100\;\text{L}} \\\phantom{[\text{H}^{+}]}= 0.50\;\text{mol}\cdot\text{L}^{-1}[/tex].
[tex]\text{pH} = -\log{[\text{H}^{+}] = -\log{0.50} \approx {\bf 0.30}[/tex].
(C)Similarly to HCl and HBr, HI is also a strong acid. Mixing HI and NaOH at equal ratio will produce a solution of NaI, which is similar to NaCl. The final solution will be neutral. pH = 7 if pKw = 14.
(D)NH₃ is a weak base. NH₄Cl dissolves completely to produce NH₄⁺ and Cl⁻. NH₄⁺ is the conjugate acid of NH₃. The final solution will contain an equal number of NH₃ and NH₄⁺. pKb = 4.75 for ammonia NH₃.
Apply the Henderson-Hasselbalch equation for buffers of weak bases:
[tex]\displaystyle \textbf{pOH} = \text{pK}_b + \log{\frac{[\text{Conjugate Ion}]}{[\text{Weak Base}]}}= 4.75 + \log{1} = 4.75[/tex].
Note that what this equation gives for buffers of weak bases is the pOH of the solution. pH = pKw - pOH. Assume that pKw = 14. pH = 14 - 4.75 = 9.25.
(E)The solution in (E) will contain about 1.0 M of CH₃COOH. The volume of the solution will be 200 mL.
[tex]n(\text{CH}_3\text{COO}^{-}) = n(\text{NaOH}] = c\cdot V = 0.10\;\text{mol}[/tex].
[tex]\displaystyle [\text{CH}_3\text{COO}^{-}] = \frac{n}{V} = {0.10}{0.10 + 0.10} = 0.50 \;\text{mol}\cdot\text{L}^{-1}[/tex].
There's nearly no conjugate base of CH₃COOH. As a result, the solution will not be a buffer, and the Henderson-Hasselbalch Equation will not apply. Refer to an ICE table:
[tex]\begin{array}{c|ccccccc}\text{R}&\text{CH}_3\text{COO}^{-} &+&\text{H}_2\text{O}&\rightleftharpoons &\text{CH}_3\text{COOH}&+&\text{OH}^{-}\\\text{I}&0.50\\\text{C}& -x &&&& +x &&+x\\\text{E} &0.50 - x &&&&x&&x\end{array}[/tex]
The value of pKa is large. Ka will be small. the value of [tex]x[/tex] will be much smaller than [tex]0.50[/tex] such that [tex]0.50-x \approx 0.50[/tex].
The pKa of a weak acid is the same as pKw divided by the pKb of its conjugate base.
[tex]\displaystyle \frac{[\text{CH}_3\text{COOH}]\cdot[\text{OH}^{-}]}{[\text{CH}_3\text{COO}^{-}]} = \text{K}_b(\text{CH}_3\text{COO}^{-}) \\\phantom{\displaystyle \frac{[\text{CH}_3\text{COOH}]\cdot[\text{OH}^{-}]}{[\text{CH}_3\text{COO}^{-}]} }= \frac{\text{K}_w}{\text{K}_a(\text{CH}_3\text{COOH})} \\\phantom{\displaystyle \frac{[\text{CH}_3\text{COOH}]\cdot[\text{OH}^{-}]}{[\text{CH}_3\text{COO}^{-}]}} = \frac{10^{-14}}{1.75\times 10^{-5}} = 5.71\times 10^{-10}[/tex].
[tex]\displaystyle \frac{x^{2}}{0.50} =5.71\times 10^{-10}[/tex].
[tex][\text{OH}^{-}] = x \approx 1.69\times 10^{-5}\;\text{mol}\cdot\text{L}^{-1}[/tex].
[tex]\text{pH} = \text{pK}_w + \log{[\text{OH}^{-}]} = 9.23[/tex].
 If 255 g of water has 10.0 g of NaCl dissolved into initially, how much NaCl must be added in order to raise the mass percent of NaCl by 10%?
Mass percentage is one way of representing the concentration of an element in a compound or a component in a mixture. To calculate percent by mass, you need to determine two things: the mass of just the element, and the molar mass of the whole compound. We calculate as follows:
.10 g NaCl / g NaCl + Water = ( 10.0 g NaCl + x ) / (10.0 g + 255 g + x )
x = 18.33 g NaCl needed
What does the ideal gas law describe
the law that the product of the pressure and the volume of one gram molecule of an ideal gas is equal to the product of the absolute temperature of the gas and the universal gas constant.
Ideal Gas Law has been described below.
What is Ideal Gas Law ?According to Ideal gas law , the product of Pressure and Volume for 1 mole of an ideal gas is equal to the product of Temperature and Universal Gas Constant R
The equation is represented by
PV = nRT
It is valid only for ideal gases and no gas is ideal, At STP all the gases are considered to behave ideally.
It is a combination of the empirical Boyle's law, Charles's law, Avogadro's law, and Gay-Lussac's law.
It relates the macroscopic properties of gases.
It has wide applications in the processes where gas is involved.
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Six bonding pairs around a central atom results in a what?
A. tetrahedral compound
B. linear compound
C. trigonal bipyramid
D. octahedral
Answer:
octahedral
Explanation:
Six bonding pairs around a central atom result in an octahedral. Hence, option D is correct.
What is an octahedral structure?Octahedral molecules contain six atoms bonded to the central atom and no lone electron pairs, making the steric number equal to six.
VSEPR theory was first coined by Gillespie and Nyhlom in 1957 as an improvement over the Sidgwick - Powell theory.
According to this theory, the shape of a molecule is determined by the number of electron pairs that surround the valence shell of the central atom in the molecule. The electron pairs are positioned as far apart in space as possible to minimize the repulsion of electron pairs.
However, the presence of lone pairs distorts the shape anticipated for the molecule on the basis of VSEPR.
For a molecule having six electron pairs, an octahedral geometry is expected(electron domain geometry).
Hence, option D is correct.
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Describe the atomic theory of atoms. How does this help us understand differences the three states of matter?
1) Everything is made up of atoms. 2)Atoms are indivisible and also undestroyable. 3) The combination of 2+ different kinds of atoms creates compounds 4) A chemical reaction happens when atoms are rearranged/moved around.
Dalton's atomic theory provides a basis for understanding matter at a microscopic level. This understanding aids in interpreting the differences in the three states of matter - solid, liquid, and gas. In these different states, atoms exhibit different degrees of freedom and arrangements.
Explanation:The atomic theory of atoms was initially proposed by Dalton and it provides a microscopic understanding of the macroscopic properties of matter. According to Dalton's atomic theory, all matter is composed of small particles called atoms and each element has its unique type of atom. And crucially, atoms are neither created nor destroyed during a chemical change, which illustrates the principle of the law of conservation of matter.
This theory helps us understand the difference in the three states of matter (solid, liquid, and gas). In solids, atoms are tightly packed together, and have little freedom to move, resulting in a defined shape and volume. In liquids, atoms have more freedom to move but are still close together, resulting in a defined volume, but the shape of the liquid changes to fit its container. In gases, atoms have the most freedom to move and are farther apart, resulting in neither a defined shape nor volume.
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What is the standard value for T in the common form of the Nernst equation?
A.
1.0° Celsius
B.
25° Celsius
C.
52° Celsius
D.
298° Celsius
C.
52° Celsius
Hope this helped!
The standard value for temperature T in the Nernst equation is 25°C (298 K). This temperature is commonly used since standard-state values in thermodynamics are typically listed at this temperature.
The standard value for T in the common form of the Nernst equation is 25°C, which is equivalent to 298 K. This value is often used because most thermodynamic tables list the standard-state values at 298.15 K (or 25° C), and it's a common assumption that reactions or processes are taking place under so-called 'room temperature' conditions.
The Nernst equation itself indicates that cell potential is dependent on concentration, and it fundamentally relates the voltage of an electrochemical cell to the concentrations of reactants and products at a given temperature.
How do I find the volume of a gas at stp if it’s volume is 80.0mL at 109kPa and -12.5 degrees Celsius
all i really know is that STP (standard temperature and pressure) represents conventional conditions established by IUPAC with T = 273.15 K, P = 1 atm . Now putting these values of temperature and pressure at STP, we can calculate easily volume occupied by 1 mol of gas and which comes out to be 22.4 L. hope this helps
Answer:
Volume of the gas is 90.2 ml
Explanation:
Given:
Initial volume, V1 = 80.0 ml = 0.080 L
Initial pressure, P1 = 109 kPa = 1.076 atm ( 1 kPa = 0.00987 atm)
Initial temperature, T1 = -12.5 C = -12.5 + 273 K = 260.5 K
Under STP conditions i.e. standard temperature and pressure we have:
Pressure, P2 = 1 atm
Temperature, T2 = 273 K
Formula:
Based on the ideal gas relation we have:
[tex]\frac{P1V1}{T1} =\frac{P2V2}{T2} \\\\V2 = \frac{P1V1}{T1} (\frac{T2}{P2} ) = \frac{1.076*0.080}{0.260.5} (\frac{273}{1} )=0.0902 L[/tex]
5. An aluminum (Aℓ) cylinder is 10.0 cm in length and has a radius of 2.5 mm. If the mass of a single Aℓ atom is 4.48 x 10-23 g, calculate the number of Aℓ atoms present in the cylinder. The density of aluminum is 2.70 g/cm3. (Volume of a cylinder = π r2 ℓ and π=3.14)
= 1.183 × 10^25 atoms
Explanation;Volume of a cylinder is given by the formula;
πr²h , where r is the radius, and h is the height or length.
Volume = 3.14 × 2.5² × 10
= 196.25 cm³
But density = 2.7 g/cm³
Therefore;
Mass = volume × density
= 196.25 × 2.7
= 529.875 g
But; 1 atom = 4.48 x 10-23 g
Therefore;
Number of atoms = 529.875 g / 4.48 x 10-23 g
= 1.183 × 10^25 atoms
Answer:
1.2 x 1023 atoms
Explanation:
HELP!
Identify the parts of the telescope.
-primary mirror
- secondary mirror
- eyepiece
Primary mirror is the bottom right space.
Secondary mirror is the left space.
Eyepiece is the top right space.
Hope this helps.
Answer:
Top box: eye piece.
2nd Box: Primary Mirror
Box closest to the bottom: Secondary Mirror
Explanation:
science
How is the number 8.697 x 10-5 expressed in regular numerals? 0.0008697 0.00008697 0.08697
How is the number 8.697 x 10-5 expressed in regular numerals? C. 0.08697
Which are heterotrophs that obtain their energy by breaking down waste materials and remains of dead organisms?
A. scavengers
B. decomposers
C. primary consumers
D. secondary consumers
B. Decomposers
Explanation;Decomposers are organisms that gets energy by breaking down the remains of dead organisms or animal wastes and consuming or absorbing the nutrients. Organism "feed" by chemically breaking down organic matter. Examples: bacteria and fungi.Scavengers are animals that consume carcasses of other animals that have been killed by predators or have died of other causes. Example: vulture.Consumers are organisms that rely on other organisms for energy and nutrients. An organism that obtains energy and nutrients by feeding on other organisms or their remains.Answer:
B
Explanation:
which of these is not biomass energy source? A. wind B. manure C. garbage D. lumber
I believe the answer is A wind,it's not bio
C. garbage because most garbage is human made
Which cellular change in an organism could be inherited be the next generation?
In order for a cellular change to be inherited, this change must be present in the male gamete, or sperm or present in the female gamete, the egg or ovum. This is due to the fact that a baby is created from the fusion of an egg and sperm. Therefore, choice 2, the deletion of a single DNA base in a sperm cell of a trout, is the correct answer.
If we think about it logically, cellular changes in other parts of body should not affect the next generation. For example, if mom has skin cancer, it does not mean at all that the baby will have it as well.
Explain the law of conservation of mass
The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants
what structure of protein is the amino acid squence
DNA
all I had to do was just think back to middle school when I learned that
the only definite evidence of a chemical reaction is
A) The production of new substances
B) Changes in phase
C) Formation of a gas
D) A color change
An archer shot a 0.06 kg arrow at a target. The arrow accelerated at 5,000 m/s/s to reach a speed of 50.0 m/s as it left the bow. During this ACCELERATION, what was the net force on the arrow to the nearest newton? *
1 point
A. 3 N
B. 833 N
C. 300 N
D. None of the above
C. 300 N
Explanation;From Newton second's Law of motion, the resultant force is directly proportional to the rate of change in momentum.
Therefore;
F = ma ; where F is the resultant force, m is the mass and a is the acceleration.
Therefore;
F = 0.06 kg × 5,000 m/s/s
= 300 N
The net force on the arrow to the nearest newton during this acceleration is: C. 300 Newton.
Given the following data:
Mass of arrow = 0.06 kgAcceleration of arrow = 5,000 [tex]m/s^2[/tex]Speed = 50.0 m/sTo determine the net force on the arrow to the nearest newton during this acceleration, we would apply Newton's Second Law of Motion:
Newton's Second Law of Motion states that the acceleration of an object or body is directly proportional to the net force acting on the object or body while being inversely proportional to its mass.
Mathematically, Newton's Second Law of Motion is given by this formula;
[tex]Net\;force = mass \times acceleration[/tex]
Substituting the given parameters into the formula, we have;
[tex]Net\;force = 0.06 \times 5000[/tex]
Net force = 300 Newton
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Which is the basic cell of the nervous system
A neuron
B axon
C sodium
D dendrite
The basic cell is a neuron
In thrust faulting:
In thrust faulting: sedimentary rock is horizontal and undeformed
older rock layers are pushed on top of younger rock layers
extreme pressure changes metamorphic rock into igneous rock
the surface of the earth is raised only slightlysedimentary rock is horizontal and undeformed thats the one
Hope this helped!
Thrust faulting is a form of geological fault that occurs when one section of earth's crust is forced over another, causing rock layers to overlap and creating geological features like mountains. It's associated with the forces of tectonic plate interactions and plays a key role in understanding how the earth's surface has changed over time.
Explanation:In the earth's crust, thrust faulting is a type of fault in geology that occurs when one slab of the earth's crust is forced up and over another. This movement results in layers of rock being pushed on top of each other, causing significant distortion and upheaval, as well as leading to the creation of various geologic features such as mountains. The process of thrust faulting is often associated with the powerful forces of tectonic plate interactions, particularly at convergent boundary areas where plates are pushing against each other. It's an essential concept in interpreting the earth's complex geological history as it contributes to our understanding of how our planet's surface has changed and evolved over many millions of years.
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The functional group for an aldehyde is
A. ( - COOH)
B. (- OH)
C. (- COH)
D. (-CO)
The functional group of aldehyde is - COH
This group is attached to another carbon chain giving the hydrocarbons that contain this functional group the general formula: R-COH
The functional group gives the aldehydes their chemical properties as it can be displaced during reactions to form new compounds.
Answer:
- COH
Explanation:
What is the flame color of sodium
A yellow flame is produced by sodium
Blue,green,orange and red
Why can liquid water never go over the boiling point temperature? Where is the energy (heat) that is being added going?
Answer: Liquid water can never go over the boiling tempurature because it will turn into steam. The heat is going into the water particles which converts the liquid into steam.
Explanation:
When liquid particles are heated, they move around faster and bump into each other, and destribute the heat around the liquid evenly. This process is called convection. As the particles move fast enough, they turn the liquid into a gas. This process is called evaporation. So the gas is now at a liquid boiling point tempurature, but it in a liquid form can never go higher from that tempurature without turning into a gas.
At boiling point, added energy converts liquid water to gas by breaking intermolecular forces, not raising the temperature.
The boiling point of water occurs when its vapor pressure equals the external pressure.
At standard atmospheric pressure, water boils at 100°C (212°F).
Heating water increases molecular kinetic energy, aiding in overcoming intermolecular forces.
Instead of raising the temperature further, added energy breaks intermolecular bonds, initiating vaporization.
Vaporization is the phase change from liquid to gas, driven by energy input.
The latent heat of vaporization for water is about 2260 J/g at 100°C.
During vaporization, temperature remains constant until all liquid converts to gas.
Once vaporization is complete, additional energy increases steam temperature.
Boiling water undergoes phase change without temperature increase until all liquid becomes gas.
explain how the amount of energy required to raise the temperature of an object is calculated
E = m × c × θ,
Where E is the energy transferred in joules, m is the mass of the substances in kg, c is the specific heat capacity in J/kg degrees C and θ is the temperature change in degrees C.what characterizes a strong acid or base?
1)polar covalent bonding
2)complete ionization in water
3)ionic bonding
4)presence of a hydroxide or hydrogen ion
It is number 2.
Because an acid or base's strength refers to its degree of ionization. A strong acid will completely ionize in water while a weak acid will only partially ionize.
Therefore, whether a acid is strong or weak is based on their ionization in water. Thus, the same goes for the base.
A strong base is a base which is completely dissociated in an aqueous solution.
Answer:
1-b, 2-b, 3-b, 4-B, 5b
Explanation:
HONORS CHEMISTRY
1. complete ionization in water
2. ionization constant
3. a god hydrogen-ion acceptor
4. weak acid
5. this base ionizes slightly in aqueous solutions
Photochemical smog results from the interaction of pollutants in the presence of
A. Water vapor
B. Oxygen
C. Sunlight
D. Rainfall
Water vapor in the air
Answer:
The answer is water vapor.
Explanation:
Is boron reactive, why or why not?
No.
Explanation:Since Boron is a poor conductor of electricity it is non-reactive. For that case it is still water soluble.
Not the right answer or confused? Reply to this question for help.
No, it is a poor conductor of electricity
What animals are listed in the picture?
starfish , squid , sea turtle are the only ones i know
Why do we itch . Why do we react the way we do
The skin feels a certain sensation from outside influences. The same thing that itches also detects hot, cold and sensations of other kinds. The technical term for it is stimulation of pruriceptors. When these pruriceptors are stimulated, the brain reacts with an appropriate response.
Question : Why do we itch. Why do we react the way we do?
i would say that we would like to remove the irritant as possible and once you have scratched the area of irritation and your likely going to find some relief with your finger nail scratched away the irritant then it gets sent to your brain saying it gone and your all good.
Hopefully that helps you ! have a good day !
After a volcanic eruption, it is nearly impossible for plant life to grow due to the poor soil. True or false?
This is FALSE
The soil would be almost infertile after all the magma and heat. It cannot grow crops and plants will not be able to survive. It becomes 'baked' and therefore is very hard to grow ANYTHING
However after a period of time, the soil can make use of volcanic nutrients and grow lush plants (but this is after a while)
After a volcanic eruption, it is nearly impossible for plant life to grow due to the poor soil is a false statement.
What is a volcanic eruption?A volcanic eruption is when lava and gas are released from a volcano—sometimes explosively.
After a volcanic eruption,the soil in this region is rich because volcanic eruption deposits the necessary minerals, which are then weathered and broken down by rain. Once absorbed into the soil, they become a steady supply of nutrients for plant life.
Hence, the correct answer is false.
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An atom with an equal number of electrons and protons has no ______.
no charge
this is because protons have a charge of 1+ and electrons have a charge of 1- so if there is an equal number of them, their charges cancel each other out and make the atom have a charge of 0, which means no charge
Answer: An atom with an equal number of electrons and protons has no charge
Explanation: The charge of an atom comes from the electrons and protons present. Electrons have a charge of 1- and protons have a charge of 1+. When the number of electrons and of protons are equal, an atom has no overall charge.
When 5.12 g of NaOH were dissolved in 51.55 g water in a calorimeter at
24.5°C, the temperature of the solution went up to 49.8°C.
-Calculate q of solution.
-Find ΔH in kJ/mol for the reaction as it occurred in the calorimeter.
Q = 6.00 kJ
given that the heat capacity of the final solution is the same as that of pure water of equal mass.
ΔH = 468 kJ/mol.
Both answers come with three sig. fig. as in data in the question.
Explanation(1)Final mass of the solution:
[tex]m = \text{Mass of Solution} = \text{Mass of Solute} + \text{Mass of Solvent} = 51.55 + 5.12 = 56.67\;\text{g}[/tex].
An increase in temperature by one degree celsius is the same as an increase in temperature by one degree Kelvin. Change in temperature:
[tex]\Delta T = \text{Final Temperature} - \text{Initial Temperature} = 49.8 - 24.5 = 25.3\;\text{K}[/tex].
Assume that the specific heat capacity of the NaOH solution is the same as the specific heat capacity of pure water:
[tex]c = 4.182\;\text{J}\cdot\text{g}^{-1}\cdot\text{K}^{-1}[/tex].
In other words, it takes 4.182 Joules of energy to raise the temperature of one gram of pure water by one degree Kelvin. Assume that so is the case for the NaOH solution.
Energy change:
[tex]Q = c\cdot m \cdot \Delta T = 4.182 \times 56.67 \times 25.3 = 5995.95\times 10^{3} \;\text{J} = 6.00\times 10^{3}\;\text{J}[/tex].
(2)Refer to a periodic table for relative atomic mass:
Na- 22.990;O- 15.999;H- 1.008.Formula mass of NaOH:
[tex]M(\text{NaOH}) = 22.990 + 15.999 + 1.008 = 39.997\;\text{g}\cdot\text{mol}^{-1}[/tex].
How many moles of formula units in that 5.12 gram of NaOH?
[tex]\displaystyle n = \frac{m}{M} = \frac{5.12}{39.997} = 0.128010\;\text{mol}[/tex].
ΔH measures the energy change per mole of NaOH dissolved. Dissolving 5.12 grams or 0.128010 moles of NaOH releases [tex]5.99595\times 10^{3} \;\text{J}[/tex] of energy.
[tex]\displaystyle \Delta H = \frac{Q}{n} = \frac{5.99595\times 10^{3}\;\text{J}}{0.128010\;\text{mol}} = 4.68\times 10^{5}\;\text{J}\cdot\text{mol}^{-1} = 4.68\times 10^{2}\;\text{kJ}\cdot\text{mol}^{-1}[/tex].
To calculate q of the solution, use q = m × c × ΔT. To find ΔH in kJ/mol for the reaction, use ΔH = q / n.
Explanation:To calculate q of the solution, we can use the equation: q = m × c × ΔT, where m is the mass of the water, c is the specific heat capacity of water, and ΔT is the change in temperature. The specific heat capacity of water is approximately 4.18 J/g°C. First, we need to calculate the mass of the water by subtracting the mass of NaOH from the total mass. Then, we can calculate q using the equation.
To find ΔH in kJ/mol for the reaction as it occurred in the calorimeter, we can use the equation: ΔH = q / n, where n is the number of moles of NaOH. First, we need to calculate the number of moles of NaOH by dividing the mass of NaOH by its molar mass. Then, we can calculate ΔH using the equation.
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