2010F - CHEM 126101 Chapter 17 Regular Homework Thermodynamics II

2010F - CHEM 126101 Chapter 17 Regular Homework Thermodynamics II

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10F - CHEM 126101 - GEN CHEMISTRY II You are logged in as Andrew Sindt ( Logout ) You are here NJIT / ► 2010F - CHEM 126101 / ► Quizzes / ► Chapter 17 Regular Homework: Thermodynamics II / ► Review of attempt 3 Chapter 17 Regular Homework: Thermodynamics II Review of attempt 3 Started on Saturday, 6 November 2010, 07:30 PM Completed on Saturday, 6 November 2010, 08:25 PM Time taken 54 mins 16 secs Finish review
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Marks 31/31 Grade 10 out of a maximum of 10 ( 100 %) Question 1 Marks: 1 Calculate ΔGº (in kJ) at 298 K for the following reaction: 2H 2 O(g) +2Cl 2 (g) → 4HCl(g) + O 2 (g) Use the data in Appendix II (Tro); Appendix 4 (Zumdahl) Answer: Correct Marks for this submission: 1/1. Question 2 Marks: 1 Is the above reaction under standard conditions spontaneous in the forward direction? Choose one answer. a. YES, because ΔG is negative. b. YES, because ΔG is positive. c. NO, because ΔG is negative. d. NO, because ΔG is positive. Correct Marks for this submission: 1/1. Question 3 Marks: 1 Calculate ΔHº (in kJ) for the following reaction at 298 K: 2CO 2 (g) +4H 2 O(l) → 2CH 3 OH(l) + 3O 2 (g) Use the data in Appendix II (Tro); Appendix 4 (Zumdahl) Answer: Correct Marks for this submission: 1/1. Question 4 Marks: 1 Calculate ΔSº (in J/K) at 298 K for : 2CO 2 (g) +4H 2 O(l) → 2CH 3 OH(l) + 3O 2 (g) Use the data in Appendix II (Tro); Appendix 4 (Zumdahl) Answer: Correct Marks for this submission: 1/1. Question 5 Marks: 1
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Use ΔGº =ΔHº -TΔSº to calculate ΔG (in kJ) at 298 K for : 2CO 2 (g) +4H 2 O(l) → 2CH 3 OH(l) + 3O 2 (g) Answer: Correct Marks for this submission: 1/1. Question 6 Marks: 1 If the above reaction could be done at 2701 K, what would be your estimate for ΔGº (in kJ) at this elevated temperature? Use ΔGº =ΔHº -TΔSº and assume ΔHº and ΔSº are independent of temperature. (The º is included because it is still for standard conditions, that is, 1 atm for gases and 1 molar for concentrations.) Answer: Correct Marks for this submission: 1/1. Question 7 Marks: 1 Is the above reaction spontaneous in the forward direction at either of the temperatures? (Pick 2 answers.) Choose at least one answer. a. YES, because ΔG is negative. b. NO, because ΔG is negative. c. YES, because ΔG is positive. d. NO, because ΔG is positive. e. Because ΔH is very large and positive (strongly endothermic reaction). f. Because ΔH is very large and negative (strongly exothermic reaction).
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2010F - CHEM 126101 Chapter 17 Regular Homework Thermodynamics II

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