One mole of copper at a uniform temperature of 0°C is placed in thermal contact with a second mole of copper which, initially, is at a uniform temperature of 100 °C. Calculate the temperature of the 2-mole system, which is contained in an adiabatic enclosure, when thermal equilibrium is attained. Why is the common uniform temperature not exactly 50°C? How much thermal energy is transferred. and how much entropy is produced by the transfer? The constant- pressure molar heat capacity of solid copper varies with temperature as

Cp=22.64 +6.28x 10^-3T J/mole-K