There are two parts of a vessel. The pressure in one part is P and its volume is V. the volume of another part is 4V and there is vaccum in it. If the intervening wall is ruptured, then work done by the gas and change in its internal energy will be

Options

A. `deltaw=2PV,dU=-ve`
B. `deltaW=3PV, dU=0`
C. `deltaW=0,dU=+ve`
D. `deltaW=0,dU=0`

Answer

D

Explanation

In free expansion `deltaW=0, dU=0`