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The two solids are identical, so energy conservation: AUtot = AU1 + AU2 = 0, or:
Cv(Tf - Ti) + Cv(Tf - T2) = 0, which yields: Tf = H (Ti + T2)
The entropy change is: AStot = AS1 + AS2 = Cv ln(Tf /T1) + Cv ln(Tf / T2)
Combining:
The two solids are identical, so energy conservation: AUtot = AU1 + AU2 = 0, or:
Cv(Tf - Ti) + Cv(Tf - T2) = 0, which yields: Tf = H (Ti + T2)
The entropy change is: AStot = AS1 + AS2 = Cv ln(Tf /T1) + Cv ln(Tf / T2)
Combining:
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