Which of the following statements is correct for any thermodynamic system?
- AThe internal energy changes in all processes.
- BInternal energy and entropy are state functions.
- CThe change in entropy can never be zero.
- DThe work done in an adiabatic process is always zero.
Solution & Step-by-step Explanation
Internal energy () and entropy () are state functions because their values depend only on the state of the system (determined by parameters like P, V, T) and not on the path taken to reach that state.(A) is wrong: internal energy doesn't change in isothermal processes for ideal gases.(C) is wrong: change in entropy is zero for reversible adiabatic processes.(D) is wrong: work is done by/on the system in an adiabatic expansion/compression.