Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Identify the correct statement for change of Gibb’s energy for a system 
at constant temperature and pressure.
A
If 
, the process is not spontaneous.
, the process is not spontaneous.
B
If 
, the process is spontaneous.
, the process is spontaneous.
C
If 
, the system has attained equilibrium.
, the system has attained equilibrium.
D
If 
, the system is still moving in a particular direction.
, the system is still moving in a particular direction.
Text Solution
Verified by ExpertsThe correct answer is:
C
The criteria for spontaneity of a process in terms of 
is as follows:
If 
is negative, the process is spontaneous. If 
is positive, the process does not occur in the forward direction. It may occur in the backward direction.
If 
is zero, the system is in equilibrium.
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