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1. When work is done on the system (+∆G) to bring it into an ordered state (-∆S) which of the following is true?   a.The system releases heat. b. The process is spontaneous. c.There is no heat exchange between system and surrounding. d.The system is endothermic.   2. If ∆H is negative and ∆S is positive, which of the following is true?   a. ∆G is positive at any temperature. b.∆G is negative at any temperature. c.∆G is positive only below 0⁰C. d. ∆G is negative only above 0⁰C.   3. What is the value of ∆G when ∆H = -22 kJ/mol and ∆S = -54J/mol•K at 280⁰C in kJ/mol?   a.38 b.-20 c,20 d.-38

1. When work is done on the system (+∆G) to bring it into an ordered state (-∆S) which of the following is true?   a.The system releases heat. b. The process is spontaneous. c.There is no heat exchange between system and surrounding. d.The system is endothermic.   2. If ∆H is negative and ∆S is positive, which of the following is true?   a. ∆G is positive at any temperature. b.∆G is negative at any temperature. c.∆G is positive only below 0⁰C. d. ∆G is negative only above 0⁰C.   3. What is the value of ∆G when ∆H = -22 kJ/mol and ∆S = -54J/mol•K at 280⁰C in kJ/mol?   a.38 b.-20 c,20 d.-38

Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter18: Principles Of Chemical Reactivity: Entropy And Free Energy
Section: Chapter Questions
Problem 102SCQ
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1. When work is done on the system (+∆G) to bring it into an ordered state (-∆S) which of the following is true?
 
a.The system releases heat.
b. The process is spontaneous.
c.There is no heat exchange between system and surrounding.
d.The system is endothermic.
 
2. If ∆H is negative and ∆S is positive, which of the following is true?
 
a. ∆G is positive at any temperature.
b.∆G is negative at any temperature.
c.∆G is positive only below 0⁰C.
d. ∆G is negative only above 0⁰C.
 
3. What is the value of ∆G when ∆H = -22 kJ/mol and ∆S = -54J/mol•K at 280⁰C in kJ/mol?
 
a.38
b.-20
c,20
d.-38
 
4.Which of the following is incorrect about entropy of a substance?
 
a. Sliquid > Ssolid
b.S liq > 0
c.Sgas = 0
d.Sgas > Ssolid
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