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)

$\Delta U \rightarrow $ depends on initial and final state
$\Delta U_{1}=\Delta U_{2}=U_{B}-U_{A}$