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A 3-kg block of copper at 100C and a 1.5kg block of aluminum at 27C initially are isolated from each other and from the local environment. They are then placed in thermal contact with each other but are still isolated from the environment. To=27C and po=1 bar Determine a) the equilibrium temperature, in C b) the entropy generation for the process, in kJ/K c) the change of exergy for the copper and the aluminum, each in kJ d) the exergetic ( 2nd law) efficiency