6 44 WP 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 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 tempera ture in K and b the amount of entropy produced within the tank in kJ K Ignore heat transfer between the system and its surroundings 205GK