Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Two vessels A and B are connected via stopcock. The vessel A is filled
with a gas at a certain pressure. The entire assembly is immersed in water and is allowed to come to thermal equilibrium with water. After opening the stopcock the gas from vessel A expands into vessel 
and no change in temperature is observed in the thermometer. Which of the following statement is true?
A
B
C
D
The pressure in the vessel B before opening the stopcock is zero.
Text Solution
Verified by ExpertsThe correct answer is:
D
It is free expansion of gas 
Where
and 
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