Question

The second law of thermodynamics says that in a cyclic process

• A. Work cannot be converted into heat
• B. Heat cannot be converted into work
• C. Work cannot be completely converted into heat
• D. Heat cannot be completely converted into work

Answer 1

The correct option is D Heat cannot be completely converted into work

Second law of thermodynamics states that in a cyclic process heat cannot be converted completely into work because attainment of $0K$ temperature is impossible.