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(D) Internal energy $(U)$ is a state function,which means its value depends only on the state of the system and not on the path taken. For a cyclic pr

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$E_1 + E_2 = 0$

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(D) Internal energy $(U)$ is a state function,which means its value depends only on the state of the system and not on the path taken. For a cyclic process where the system returns to its initial state,the total change in internal energy is zero. Given the process $A \rightarrow B$ with change $E_1$ and $B \rightarrow A$ with change $E_2$,the total change is $E_1 + E_2 = \Delta U_{total} = 0$.

$A$ system is changed from state $A$ to state $B$ by one path and from $B$ to $A$ by another path. If $E_1$ and $E_2$ are the corresponding changes in internal energy,then:

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