When a system goes from state A to state B,th | vedclass

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Question

(B) Internal energy $(U)$ is a state function.
$A$ state function depends only on the initial and final states of the system,not on the path taken.

Vedclass · Accepted Answer

Zero

Vedclass · Answer

(B) Internal energy $(U)$ is a state function.
$A$ state function depends only on the initial and final states of the system,not on the path taken.
Since the system starts at state $A$ and eventually returns to state $A$ after completing the cycle,the final state is the same as the initial state.
Therefore,the net change in internal energy $(\Delta U)$ for any cyclic process is zero.

When a system goes from state $A$ to state $B$,the change in internal energy is $40 \, kJ/mol$. If the system returns from state $B$ to state $A$ via a reversible path and then returns to state $A$ via an irreversible path,what is the net change in internal energy?

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