Question

Which of the following statements is/are correct regarding the following process:

• A. dW = -Pext.dV = 0; only if the system is undergoing only P-V work.
• B. dW = -Pext.dV = 0; Irrespective of any type of work done by the system
• C. $dU\ne dq$
• D. $dW\ne 0$

Answer 1

The correct option is A dW = -Pext.dV = 0; only if the system is undergoing only P-V work.

This is an isochoric process, and hence, the volume remains constant. Since volume is constant, dV=0, and hence work done will be zero for a system undergoing only PV work