Question

The internal energy change when a system goes from state $A$ to $B$ is $40 \,k J / mol$. If the system goes from $A$ to $B$ by a reversible path and returns to state $A$ by an irreversible path, what would be the net change in internal energy?

• A. $40 \,kJ$
• B. $>\,40\, kJ$
• C. $
• D. zero

Answer 1

Answer: (D)

zero

Answer 2

$\Delta E=0,$ in a cyclic process.