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
\(m{c_v}\left( {\frac{{n - \gamma }}{{n - 1}}} \right)\ln \frac{{{T_2}}}{{{T_1}}}\)