A60-lb aluminum bar, initially at ta = 190of, is placed in a tank together with 190 lb of liquid water, initially at tw = 70of, and allowed to achieve thermal equilibrium. the aluminum bar and water can be modeled as incompressible with specific heats ca = 0.216 btu/lb·or and cw = 0.998 btu/lb·or, respectively. consider the aluminum bar and water as the system and ignore heat transfer between the system and its surroundings.

answer:

a

explanation:

key points:

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A Carnot heat engine receives heat from a reservoir at 900$^\circ{}$C at a rate of 800 kJ/min and rejects the waste heat to the ambient air at 27$^\circ{}$C. The entire work output of the heat engine is used to drive a refrigerator that removes heat from the refrigerated space at -5$^\circ{}$C and transfers it to the same ambient air at 27$^\circ{}$C. Determine (a) the maximum rate of heat removal from the refrigerated space and (b) the total rate of heat rejection to the ambient air. Answers: (a) 4982 kJ/min, (b) 5782 kJ/min