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?

For a cyclic process the net change in the internal energy is zero because the change in internal energy doesnot depend on the path.

0

zero.

that is because ''change in internal energy'' doesnt depend on the path taken. it just depends on the initial and final state

ans  "o"

"0"                      For a cyclic process the net change in the internal energy is zero because the change in internal energy doesnot depend on the path.

Simple ,it is zero.

For a cyclic process the net change in internal energy is ZERO(0).