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Explain internal energy as a state function. |
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Answer» Solution :Internal energy depends only on the state VARIABLES P, V, T and n. When the system is changed from the initial state to the final state, the change in interal energy is same for the different paths taken. (a) In a cyclic process, the net change in U is zero. (b) In an isothermal process, the change in U of an ideal gas is zero. (c ) In an adiabatic process, U of a system decreases if WORK done by the system. (d) If heat is absorbed by the system, its U INCREASES. (e) If heat is RELEASED from the system, its U decreases. |
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