The expression for entropy change given by, ΔS = nR ln (V2/V1) + nCv ln (T2/T1) is valid for ______________________?
Correct answer: B. Simultaneous heating and expansion of an ideal gas
- A. Reversible isothermal volume change
- B. Simultaneous heating and expansion of an ideal gas
- C. Cooling of a substance
- D. Heating of a substance
Explanation
This is the ideal-gas entropy relation obtained by combining the temperature and volume contributions, so it applies when temperature and volume both change. Hence it represents simultaneous heating and expansion among the listed choices.
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