Two identical finite bodies of constant heat capacity at temperatures T₁ and T₂ are available to do work in a heat engine. The final temperature T_f reached by the bodies on delivery of maximum work is

\({T_F} = \frac{{{T_1} + {T_2}}}{2}\)

\({T_f} = \sqrt {{T_1}{T_2}} \)

T_f = T₁ = T₂

\({T_f} = \sqrt {T_1^2 + T_2^2} \)

\(T_f = \sqrt {T_1 + T_2}\)

Two identical finite bodies of constant heat capacity at temperatures T1 and T2 are available to do work in a heat engine. The final temperature Tf reached by the bodies on delivery of maximum work is