1 ) An ideal gas is in contact with a heat reservoir so that it remains at a con

Question

1 ) An ideal gas is in contact with a heat reservoir so that it remains at a constant temperature of 100.0 K. The gas is compressed from a volume of 34.0 L to a volume of 15.0 L. During the process the mechanical device pushing the piston to compress the gas is found to expend 1.00 kJ of energy. How much heat flows between the heat reservoir and the gas?

2 ) ( A ) What is the change in entropy of 23 g of steam at 100° C as it condenses to water at 100° C?
( B ) What is the most that you can say about the amount (?S) by which the entropy of the rest of the universe increases in the process above?

Explanation / Answer

1) Given data: the work done on the gas W = 1.00kJ = 1000 J the temparature of the system T = 100 k According to First law of thermodynamics, dQ = dU- dw here dQ = heat given , dU = 0 internal energy and dW = work done dQ = -1000 J   since dU = 0 (constant temperature) the heat flows between the heat reservoir and the gas is 1.00 kJ. please post each quation sepatarely. please post each quation sepatarely.

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