engineering recuitment BHEL Engineer Trainee Mock Test 2025 Thermodynamics Second Law of Thermodynamics and Entropy Entropy and Irreversibility
Which equation clearly defines the entropy change during the constant pressure process for a system with m kg of gas pressure P1, volume V1, temperature T1 and entropy S1 when heated to state points of pressure P2, volume V2, temperature T2 and entropy S2?
1
\(m{c_v}\ln \frac{{{T_2}}}{{{T_1}}}\)
2
\(m{c_p}\ln \frac{{{T_2}}}{{{T_1}}}\)
3
\(mR\ln \frac{{{V_2}}}{{{V_1}}}\)
4
\(m{c_v}\left( {\frac{{n - \gamma }}{{n - 1}}} \right)\ln \frac{{{T_2}}}{{{T_1}}}\)