Q.
A system goes from A to B via two processes I and II as shown in figure. If $\mathrm{\Delta}U_{1}and\ \mathrm{\Delta}U_{2}$ are the changes in internal energies in the processes I and II respectively, then
A) $\mathrm{\Delta}U_{1} = \ \mathrm{\Delta}U_{2}$
B) Relation between $\mathrm{\Delta}U_{1}and\ \mathrm{\Delta}U_{2}$ cannot be determined
C) $\mathrm{\Delta}U_{2} > \ \mathrm{\Delta}U_{1}$
D) $\mathrm{\Delta}U_{2} < \ \mathrm{\Delta}U_{1}$
Explanation
(a) The change in internal energy does not depend upon path followed by the process. It only depends on initial and final states.
Hence, $\mathrm{\Delta}U_{1} = \mathrm{\Delta}U_{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.