Q. Which of the following statement is correct for any thermodynamic system?
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
Explanation
(b) Internal energy does not change in isothermal process. $\mathrm{\Delta}S$ can be zero for adiabatic process. Work done in adiabatic process may be non-zero.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.