A system changes from state X to Y with a change in internal energy measuring to `"25 kJ mol"^(-1)`, by a reversible path and returns from Y to X by an irreversible path. What will be the net change in internal energy?

Change in internal energy of a system is

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

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

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

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

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

The internal energy change when a system goes from state P to Q is 30 kJ*mol^(-1) . If the system goes from P to Q by a reversible path and returns to state P by an irreversible path, what would be the net change in internal energy-