Question

A system goes from A to B via two processes I and II as shown in figure. If $\Delta U_{1}and \, \Delta U_{2}$ are the changes in internal energies in the processes I and II respectively, then

• A. $\Delta U_{1}= \, \Delta U_{2}$
• B. Relation between $\Delta U_{1}and \, \Delta U_{2}$ cannot be determined
• C. $\Delta U_{2}> \, \Delta U_{1}$
• D. $\Delta U_{2} < \, \Delta U_{1}$

Answer 1

Answer: (A)

The change in internal energy does not depend upon path followed by the process. It only depends on initial and final states.
Hence, $\Delta U_{1}=\Delta U_{2}$