Q. 2

In a process on a system, the initial pressure and volume are equal to the final pressure and volume.
A. The initial temperature must be equal to the final temperature.

B. The initial internal energy must be equal to the final internal energy.

C. The net heat given to the system in the process must be zero.

D. The net work done by the system in the process must be zero

Answer :

From ideal gas equation, we know that


PV=nRT


Where P=pressure


V=volume


n=number of moles


R=gas constant


T=temperature


If PiVi=PfVf


Then nRTi=nRTf


Ti=Tf


Since the initial state of the system (Pi, Vi, Ti) is equal to final state of the system (Pf, Vf, Tf), initial and final internal energy will also be equal as internal energy is a state variable.

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