**Problem 21: Thermochemistry**21. Given the following two equations:\[ \text{C}_2\text{H}_5\text{OH(l)} + 3 \text{O}_2\text{(g)} \rightarrow 2 \text{CO}_2\text{(g)} + 3 \text{H}_2\text{O(l)} \quad \Delta H = -1370 \, \text{kJ} \]\[ \text{C}_2\text{H}_4\text{(g)} + 3 \text{O}_2\text{(g)} \rightarrow 2 \text{CO}_2\text{(g)} + 2 \text{H}_2\text{O(l)} \quad \Delta H = -1410 \, \text{kJ} \]**Calculate $\Delta H$ for the reaction:**\[ \text{C}_2\text{H}_4\text{(g)} + \text{H}_2\text{O(l)} \rightarrow \text{C}_2\text{H}_5\text{OH(l)} \quad \Delta H = ? \]**Options:**a. $-2780 \, \text{kJ}$b. $2780 \, \text{kJ}$c. $-40 \, \text{kJ}$d. $40 \, \text{kJ}$ ---### ExplanationTo solve this problem, we need to manipulate the given thermochemical equations to derive the enthalpy change ($\Delta H$) for the target reaction. Consider using Hess's Law, which states that the total enthalpy change in a chemical reaction is the same regardless of the pathway taken, as long as initial and final conditions are the same. The strategy involves reversing and/or multiplying the given equations as necessary to sum to the desired reaction.

Answered: Image /qna-images/answer/a8408aa1-94d0-40cf-80df-39b6d69fed53.jpg

21. Given the following two equations С-Н-ОН(1) + 3 O2(8) → 2 CO2(8) + 3 H2O(1) AH = -1370 kJ СЭНА(8) + 3 Ог(8) → 2 CO2(8) + 2 H2O(1) AH = -1410 kJ Calculate AH for the reaction C2H4(8) + H2O(1) → CH$OH(1) ΔΗ-? %3D a. -2780 kJ b. 2780 kJ c. -40 kJ d. 40 kJ

21. Given the following two equations С-Н-ОН(1) + 3 O2(8) → 2 CO2(8) + 3 H2O(1) AH = -1370 kJ СЭНА(8) + 3 Ог(8) → 2 CO2(8) + 2 H2O(1) AH = -1410 kJ Calculate AH for the reaction C2H4(8) + H2O(1) → CH$OH(1) ΔΗ-? %3D a. -2780 kJ b. 2780 kJ c. -40 kJ d. 40 kJ

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Related questions

Q: Given the following reaction C(s)+ 800₂(g) → 57 CO₂(g)+ 52H,00) AH comb 35100 kJ = mol determine the…

A: We need to find the amount of heat absorbed or released when 454 g of C57H104O6 is burned in the…

Q: Determine the AH of the reaction 1 2NO29) +502cg) N205(s) 3 N205(s) → 2NO(9) + +502(g) O2(9) AH =…

A: Given: Reaction (1): N2O5(s) ---> 2NO(g) + (3/2)O2(g) ∆H1 = 223.7 kJ Reaction (2): NO(g)…

Q: Which process is endothermic? Melting of ice Condensation of water vapor O Combustion of magnesium O…

A: Endothermic reactions are the reactions in which heat is absorbed during the course of the…

Q: Calculate ΔH for the following reaction: 2 H2S + 3 O2 → 2 SO2 + 2 H2O ΔH = ?? Given the…

Q: 7. Consider the combustion of methanol: pg292 2CH3OH(I) + 302(g) 2CO2(g) + 4H2O(I) Calculate the AH…

Q: Calculate AHxn for the reaction: 5 C(s) + 6 H2(8) → C,H12(1) Use the following reactions and given…

A: ∆Hrxn =-∆H1 + ∆H2 +∆H3 × 3 ∆Hrxn = - ( -3244.8) + ( -393.5 ) + ( -483.5 x 3 ) = 3244.8…

Q: Given the reactions, X(s) + O₂(g) → XO(s) - XCO3(s)→ XO(s) + CO₂(g) what is AH for this reaction? AH…

Q: 3. Given these values of AH°: CS200) + 302(g) → CO2(g) + 2SO2(g) H2(g) + O2(g) H2O2(0) H2(g) +…

A: The target reaction is CS2(l) + 6H2O2(l) → CO2(g) + 6H2O(l) + 2SO2(g). We need to find the ΔH° for…

Q: Given the following reactions: CH4 + 3 02 - 2 CO2 + 2 H20 дн -- 1422 k H2 + 1/2 02 - H20 дн -- 277 k…

Q: Given the following information, calculate AHrxn for reaction 2, below. reaction 1: А + 3B AHrxn =…

Q: Given the following: NAOH (aq) + HCI (aq) --> H20 (1) + NaCI (aq) DHreaction = -55.83 kJ/mol %3D…

Q: 10. From the following enthalpies of reaction 2 H2 (g) + O2 (g) →2 H,0 () AH = -572 kJ H2 (g) + O2…

A: The reaction is said to be endothermic if the heat is absorbed in the reaction. The sign of enthalpy…

Q: Given the following data: 2H2 (g) + C(s) → CH, (9) A G° = -51 kJ 2H2 (9) + O2 (9) → 2H2O(1) A G° =…

A: Given data Reaction(1) : 2 H2 (g) + C (s) → CH4 (g) ∆G1°=-51 KJReaction(2) : 2 H2…

Q: 4NH3 + 50₂ → 4NO + 6H₂0 Given: 2NH3 → N₂ + 3H₂ AH = +92 kJ 2H₂O → 2H₂ + O₂ AH = +572 kJ N₂0₂ + 2NO…

A: In the given problem, the ∆H is calculated for the following reaction- 4NH3 + 5O2 → 4NO…

Q: 8. For the reaction 2CH4 (g) + 3 C12 (g)→2 CHC13 (1) +3 H2 (g), AH° = -118.6 kJ. AH°f=-134.1 kJ/mol…

A: ∆H°=-118.6kJ ∆H°f=-134.1kJ/mol ∆H°f for CH4=?

Q: What is the AH° for the following reaction: H2O (1) + CH4 (g) --> CH;OH (I) + H2 (g) Given the AHf…

A: Consider the given reaction is as follows; H2O l + CH4 g → CH3OH l + H2 g The value of ∆H° for the…

Q: → 2Fe20(s) AH® =? AH° = -544kJ [1]4 Fe0(s) + 02(g) [2] 2Fe(s) + 029) [3] 4 Fe(s) + 3 02(9) → 2…

A: The enthalpy change for the desired reaction can be calculated by using the enthalpy of the given…

Q: Given the following reactions 2NO → N2 + O2 AH = -180 kJ 2NO + O2 → 2NO2 AH = -112 kJ

A: Solution Given that 2NO N2 + O2 ∆H = -180 kJ 2NO +…

Q: For potassium, the enthalpy of vaporization is 76.90 kJ/mol and the entropy of vaporization is 73.45…

A: The thermochemical equations can be treated as algebraic equation which can be added, subtracted,…

Q: Given the following reactions: → 2C02(9) + H20(t) AH° = -1299.5 kJ CH2(9) + ½02(g) CO 2(g) - ΔΗΟ =…

A: Hess' law of constant heat summation: The Hess law states that the change of enthalpy in a chemical…

Q: Given that H, (g) + F,(g) → 2 HF(g) AHn = -546.6 kJ. 2 H, (g) + 0,(g) 2H,O(1) AHn = -571.6 kJ…

Q: Find the AH of the following reaction:

Q: Given the following equation: NO(g) + 03(g) What is the AH value for the equation: - 1030 kJ O 345.0…

A: If a given chemical equation is multiplied by any number then the enthalpy of reaction will also be…

Q: A chemist measures the enthalpy change AH during the following reaction: 2 H₂O(1) + 0₂(g) →2 H₂O₂(1)…

A: The objective of the question is to calculate the enthalpy change ΔH for the given reactions using…

Q: Consider the combustion of methane (CH4) CHA) + 202(9) → CO6) + 2H,OG) CHAG) CO2(9) Calculate the…

A: Consider the given information is as follows; CH4g + 2 O2g → CO2g + 2 H2Og…

Q: Calculate the value of AHXN , in kJ, for the reaction: 2E + M → X + Q Using the following reactions:…

Q: Determine AH for the following reaction: C2H2(g) + 2 H2(g) → C2H6(g); AH =? given the following…

A: 8. Given reaction, C2H2(g) + 2 H2(g) → C2H6(g) ∆H = ?

Q: *Given the equations: S(s) + O2(g) SO2(g) H° = -296.1 kJ 2503(g) → 2502(g) + O2(g) H°= 198.2 kJ…

A: We have been given two chemical equations and their enthalpies and we have been asked to find out…

Q: Given the following reactions: OF2 + H20 → O2 + 2 HF AH = - 295 kJ SF4 +2 H20 → SO2 +4 HF AH=-816 kJ…

A: Hess's law states that when a reaction occurs in multiple steps then its enthalpy change is the…

Q: 4. Calculate AH for the reaction: Use the following data: C + O₂ CO₂ CO + 1/2O2 → CO2 C + 1/2O₂ → CO…

A: Since,According to Hess's law change of enthalpy in a chemical reaction is same regardless of…

Q: 2. Given the following data: P4(s) + 6CI2(g) →> 4PC|3(g) AHrxn = 1225.6 kJ %3D P4(s) + 502(g) →>…

Q: Use the information provided to determine AH°rxn for the following reaction: AH°f (kJ/mol) CH4(3) +…

Q: 3 Fez03 + Co → 2FE304 + CO2 Given the following information: Fe203 + 3 CO → 2 Fe t3 CO2 AH = -5.7KJ…

Q: 7. Calculate AH for 2NO(g) + O2(g) N2O4(9), Using the following information: 2NO2 (g) N₂O4(g) 2NO(g)…

A: Since,According to Hess's law change of enthalpy in a chemical reaction is same regardless of…

Q: The value of Kj and K for hydrosulfuric acid are 1.00x107 and 1.00x10-19 , respectively. (Use H3O*…

A: The polyprotic acids undergo successive dissociation when gets dissolved in solutions. In the first…

Q: Calculate AHrxn for the following reaction: Fe, O3 (s) + 3C0(g) 2Fe(s) + 3CO2(g) Use the following…

A: Given;

Q: 2. Consider the following hermochemical Fe₂O3 + 300 equations: 2Fe + 3'00₂ 3Fe + 40₂ ACO + Fe 304…

A: Enthalpy of a system is obtained by the sum of internal energy and work done of the system .

Q: For which one of the following reactions is the value of AH°rxn equal to AHf for the product? O2Ca…

Q: Calculate AH for: N₂ + 10 C +5 H₂ → 2 C5H5N - by using the following known thermochemical reactions:…

Q: N2(8) +0,(8) → 2NO (g ) AH = 180.5 kJ NO (8 ) + -0,(8)→NO ,(8) AH = -57.1 kJ Calculate the AHrxn for…

Q: Calculate AH° for the reaction, Co3O4(s)→ 3Co(s) +202(g), from the following information: Co(s) +…

A: Answer:Properties that depend on the size of the system are called as extensive properties. They are…

Q: Estimate AH for the reaction. ΔΗ = 197| ΑΣΦ ? 2Cl-N-Cl →N=N + 3Cl-Cl CI kJ

Q: reaction at 550 K Calculare AG rxn For the following CH₂O(g) + 2H₂ CH₂ (9) + H₂O (9) (9) Using AH =…

Question

**Problem 21: Thermochemistry**

21. Given the following two equations:

\[ \text{C}_2\text{H}_5\text{OH(l)} + 3 \text{O}_2\text{(g)} \rightarrow 2 \text{CO}_2\text{(g)} + 3 \text{H}_2\text{O(l)} \quad \Delta H = -1370 \, \text{kJ} \]

\[ \text{C}_2\text{H}_4\text{(g)} + 3 \text{O}_2\text{(g)} \rightarrow 2 \text{CO}_2\text{(g)} + 2 \text{H}_2\text{O(l)} \quad \Delta H = -1410 \, \text{kJ} \]

**Calculate $\Delta H$ for the reaction:**

\[ \text{C}_2\text{H}_4\text{(g)} + \text{H}_2\text{O(l)} \rightarrow \text{C}_2\text{H}_5\text{OH(l)} \quad \Delta H = ? \]

**Options:**

a. $-2780 \, \text{kJ}$

b. $2780 \, \text{kJ}$

c. $-40 \, \text{kJ}$

d. $40 \, \text{kJ}$

---

### Explanation

To solve this problem, we need to manipulate the given thermochemical equations to derive the enthalpy change ($\Delta H$) for the target reaction. Consider using Hess's Law, which states that the total enthalpy change in a chemical reaction is the same regardless of the pathway taken, as long as initial and final conditions are the same. The strategy involves reversing and/or multiplying the given equations as necessary to sum to the desired reaction.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Similar questions

Consider the combustion of X (unknown compound): 2 X + 3 02 - 2 CO2 + 4 H2O with AH'rxn = -1452.8 kJ/mol. Calculate AH°f of X. Given: AH*f(CO2) = -393.5 kJ/mol: AH'f(H20) = -285.8 kJ/mol O -238.7 kJ/mol O -679 3 kJ/mol O +238,7 kJ/mol O 477.4 kJ/mol
* Consider the reaction A B with AH° = 43.19 kJ/molxn and the reaction B -→ C with AH° = 81.98 kJ/molpxn- What should be the AH° in kJ/mol,n for the reactionA→ C? Report your answer to three decimal places.
Using the following equations, N,0(g)– 2NO2(g) AH° = +57.93 kJ 2NO(g) + O(g) 2NO,(g) AH° = -113.14 kJ %3D calculate the AH° for the following reaction: 2NO(g) + O2(g)– N,0,(g) AH° = kJ
Calculate AGºrxn for the reaction: BaCO3(s)→BaO(s)+CO₂(g) Use the following reactions and given AGºrxn values: Ba(s)+CO₂(g)+1/2O2(g) →BaCO3(s) AG°rxn=-1134.4kJ 2Ba(s)+O₂(g)→2BaO(s), AGºrxn=-520.3kJ BaCO3(s)→BaO(s)+CO₂(g). AGºrxn =
2. Given the following data V(s) + 2 Cl₂(g) → VC14 (1) 1 VCl3(s) → VCl2 (s) + 2 Cl2(g) 2 VC13(s) → VCl₂ (s) + VC14 (1) calculate AH for the reaction: [-580.7 kJ] 3 V(s) + Cl2(g) → VCl3 (s) 2 AH= -569.4 kJ AH = +128.9 kJ ΔΗ = +140.2 kJ I
Given the following equation: 3 2 Al(s) + O2(8) → Al203(s) AH = -2,758 kJ Calculate the AH for the following reaction: 2 Al203(5) → 4 AI(s) + 3 O2(g) 3340 x k)
Consider the following reaction: 3C(s) + 3H2(g) → C3H6(g); AG°= 60.0 kJ and AS° =-256.7 J/K at 298 K What is the equilibrium constant and AH° at 298 K for this reaction? Express AH° in kJ and use 3 significant figures for both answers. AH° = kJ and Keq x 10
Given the following equation, H₂O(g) + CO(g) → H₂(g) + CO₂(g) What is the AG for the following reaction: 0 +5.72 kJ O+143.0 kJ O-5.72 kJ 5H₂O(g) + 5CO(g) → 5H₂(g) + 5CO2(g) 143.0 kJ O-28.6 kJ AG = -28.6 kJ AG° = ?
Consider the unbalanced equation for the neutralization of acetic acid: αHC2H3O2(aq)+βBa(OH)2(aq) →γH2O(l)+δBa(C2H3O2)2(aq) Balance the equation. Give your answer as an ordered set of numbers α, β, γ, δ. Your answers should reflect the lowest whole-number ratio of coefficients.
Calculate AHrxn for the reaction below. 2 NOCI(g) → N2(g) + 02(g) + Cl2(9) You are given the following set of reactions. 1/2 N2(g) + 1/2 02(g) → NO(g) AH = 90.30 k) NO(g) + 1/2 Cl2(g) → NOCI(g) AH = -38.6 kJ 4.0 kJ
Calculate AH for the reaction 2Sn(s) + O₂(g) → 2SnO(s) Given the following hypothetical data: Sn(s) + O₂(g) → SnO₂ (s) 2SnO(s) + O₂(g) → 2SnO₂ (s) ΔΗ AH = KJ AH AH-581 kJ - 2SnO₂ (s) AH = − 592 kJ
Consider the reaction A →B with AH° = 60.55 kJ/mol,xn and the reaction B -→C with AH = 65.96 kJ/molxn- What should be the AH° in kJ/moln for the reaction A+ C→ 2 B? Report your answer to three decimal places.