In which of the following process (es), there is no change in the internal energy of the system?

Change in internal energy of a system is

For a cyclic process, the change in internal energy of the system is ____

The change in internaL energy of a system depends on

The initial state of a system is A. this system participates in the following process: A to B to CtoA . What will be the change in internal energy of the system is this process?

What is change in internal energy in isothermal process?