MCQ
Two blocks of the same metal having same mass and at temperature $T_1$ and $T_2$ respectively, are brought in contact with each other and allowed to attain thermal equilibrium at constant pressure. The change in entropy, $\Delta S,$ for this process is
- ✓${C_p}\,\ln \,\left[ {\frac{{{{({T_1} + {T_2})}^2}}}{{4{T_1}{T_2}}}} \right]$
- B$2{C_p}\,\ln \,\left[ {\frac{{{{({T_1} + {T_2})}^{\frac{1}{2}}}}}{{{T_1}{T_2}}}} \right]$
- C$2{C_p}\,\ln \,\left[ {\frac{{({T_1} + {T_2})}}{{4{T_1}{T_2}}}} \right]$
- D$2{C_p}\,\ln \,\left[ {\frac{{({T_1} + {T_2})}}{{2{T_1}{T_2}}}} \right]$
