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A thermal reservoir at 538°C is brought into thermal communication with another thermal reservoir at 260°C, and as a result 1055 kJ of heat is transferred only from the higher to lower temperature reservoir. Determine the change in entropy of the universe due to the exchange of heat between these two thermal reservoirs.

A thermal reservoir at 538°C is brought into thermal communication with another thermal reservoir at 260°C, and as a result 1055 kJ of heat is transferred only from the higher to lower temperature reservoir. Determine the change in entropy of the universe due to the exchange of heat between these two thermal reservoirs. Correct Answer 0.678182 kJ/K

(∆S)System = ∫δQ/T = –1055/(538 + 273.15) + 1055/(260 + 273.15)= 0.678182 kJ/K (∆S)Surroundings = ∫δQ/T = 0 Change in entropy of the universe ((∆S)Universe) = (∆S)System + (∆S)Surroundings = 0.678182 kJ/K.

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