Which of the following statements is correct for any thermodynamic system

Options

A. The internal energy changes in all processes
B. Internal energy and entropy are state functions
C. The change in entropy can never be zero
D. The work done in an adiabatic process is always zero

Answer

B

Explanation

Internal energy does not change in isothermal process. `triangelS` can be zero for adiabatic process. Work done in adiabatic process may be non-zero.