Published by:
CGP EDU Academic Team
Published on: August 14, 2026
In which of the reactions at constant pressure, sign of work done is -ve i.e., work done by the system.
A
(s) 
(g) B
(l) 
(s)
C
(s) 
(s) 
(g) D
All of these
Text Solution
Verified by ExpertsThe correct answer is:
B
(i) 
(g)
Volume of system increases. So, 
(ii) 
(l) 
Volume of system increase. So, 
(ii) 
(s) 
(s) 
(g)
Volume of system increases. So, w 
So, in all the above reactions, the work done is negative.
Hence, option is correct.
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