A 2.64 kg copper part, initially at 400 K, is plunged into a tank containing 4 kg of liquid water, initially at 300 K. The copper part and water can be modeled as incompressible with specific heats of 0.385 kJ/kg. K and 4.2 kJ/kg. K, respectively. For the copper part and water as the system, determine
(a) the final equilibrium temperature (K), and
(b) the amount of entropy produced within the tank, in kJ/K.
Ignore heat transfer between the system and its surroundings.