The internal energy change when a system goes from state A to B is 40 kJ/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?

40 kJ

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>40 kJ

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<40 kJ

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Zero

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Solution

The correct option is B Zero
Internal energy is a state function. It is not path-dependent.
$Δ U = U_{f} - U_{i}$

Since the system returns to its initial state, $U_{f} = U_{i} .$

Hence, $Δ U = 0$

Hence, option D is correct.

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The internal energy change when a system goes from state A to B is 40 kJ/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?

The correct option is B ZeroInternal energy is a state function. It is not path-dependent.ΔU=Uf−UiSince the system returns to its initial state, Uf=Ui. Hence, ΔU=0Hence, option D is correct.

The correct option is B Zero
Internal energy is a state function. It is not path-dependent.
$Δ U = U_{f} - U_{i}$

Since the system returns to its initial state, $U_{f} = U_{i} .$

Hence, $Δ U = 0$

Hence, option D is correct.