Which combination of r Ho and r S o always yields a spontaneous reaction under standard conditions? A) ΔrH >0, ΔrS >0 B) ΔrH >0, ΔrS < 0 C) ΔrH < 0, ΔrS >0 D) ΔrH < 0, ΔrS
Which combination of r Ho and r S o always yields a spontaneous reaction under standard conditions? A) ΔrH >0, ΔrS >0 B) ΔrH >0, ΔrS < 0 C) ΔrH < 0, ΔrS >0 D) ΔrH < 0, ΔrS
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter16: Thermodynamics
Section: Chapter Questions
Problem 65E: When ammonium chloride is added to water and stirred, it dissolves spontaneously and the resulting...
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Question
Which combination of r Ho and r S o always yields a spontaneous reaction under standard conditions?
A) ΔrH >0, ΔrS >0
B) ΔrH >0, ΔrS < 0
C) ΔrH < 0, ΔrS >0
D) ΔrH < 0, ΔrS
Expert Solution
Step 1
The relationship between ΔGr , ΔHr and ΔSr is given by
ΔGr = ΔHr - TΔSr
where ΔSr = entropy change in reaction
ΔGr = Gibbs free energy change in reaction
and ΔHr = enthalpy change in the reaction
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