In a reversible isothermal process, the change in internal energy is :

Assertion : In an isothemal expansion the gas absorbs heat and does work . Reason: In an isothermal process there is no change in internal energy of an ideal gas.

Assertion: For an ideal gas in a cyclic process and in an isothermal process change in internal energy is zero. Reason: In both processes there is no change in temperature.

Assertion: For an ideal gas in a cyclic process and in an isothermal process change in internal energy is zero. Reason: In both processes there is no change in temperature.

Assertion : All spontaneous processes are thermodynamically irreversible. Reason : In a reversible isothermal process, there is no net change in entropy.

A : Heat supplied to a gaseous system in an isothermal process is used to do work against surroundings. R : During isothermal process there is no change ininternal energy of the system.

A : Heat supplied to a gaseous system in an isothermal process is used to do work against surroundings. R : During isothermal process there is no change ininternal energy of the system.

(A) : During change of state of a substance internal energy of a substance remains constant (R) : During isothermal process of an ideal gas change in internal energy is zero