Which statement is true? A reaction in which the entropy of the system decreases can be spontaneous only if it is exothermic. A reaction in which the entropy of the system decreases can be spontaneous only if it is endothermic. A reaction in which the entropy of the system increases can be spontaneous only if it is exothermic. A reaction in which the entropy of the system increases can be spontaneous only if it is endothermic.
Which statement is true? A reaction in which the entropy of the system decreases can be spontaneous only if it is exothermic. A reaction in which the entropy of the system decreases can be spontaneous only if it is endothermic. A reaction in which the entropy of the system increases can be spontaneous only if it is exothermic. A reaction in which the entropy of the system increases can be spontaneous only if it is endothermic.
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter13: Spontaneous Processes And Thermodynamic Equilibrium
Section: Chapter Questions
Problem 25P
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Which statement is true?
A reaction in which the entropy of the system decreases can be spontaneous only if it is exothermic.
A reaction in which the entropy of the system decreases can be spontaneous only if it is endothermic.
A reaction in which the entropy of the system increases can be spontaneous only if it is exothermic.
A reaction in which the entropy of the system increases can be spontaneous only if it is endothermic.
Expert Solution
Step 1
For a reaction to be spontaneous, ∆G must be negative.
For ∆G to be negative, either ∆H should be negative (exothermic) or the magnitude of ∆S should be greater than ∆H (if ∆H is positive, endothermic).
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