Question

Why change in internal energy is zero for isothermal process

Answer 1

Answer:

Their internal energy changes with change in pressure, even if temperature is constant. For an ideal gas, in an isothermal process, ΔU=0=Q−W, so Q=W. The internal energy is a state function dependent on temperature. Hence, the internal energy change is zero.

Answer 2

Explanation:

Because in Isothermal process the temperature is constant so change in internal energy is zero

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