Question

For cyclic process, which of the following is true regarding internal energy change $\Delta U$

• A. $\Delta U=0$
• B. $\Delta U<0$
• C. $\Delta U>0$
• D. $\Delta U\ne 0$

Answer 1

The correct option is A $\Delta U=0$

For the cyclic process, internal energy change $\Delta U=0$ since internal energy is a state function. Hence, in a cyclic process, where initial and final states are same, the initial and final internal energies are same.