A vessel which contains an ice-water mixture at 0C is in thermal contact with a

Question

A vessel which contains an ice-water mixture at 0C is in thermal contact with a water-steam mixture at 100 C.

(A) During a 10 minute period, 28 grams of steam condenses into water. How much energy flowed out of the water-steam mixture? J

(B) Assuming that all of the energy flowing out of the water-steam mixture goes into the water-ice mixture, how many kilograms of ice melts? kg

(C) What is the change in the entropy of the water-steam mixture at 100C? J/K

(D) What is the change in the entropy of the water-ice mixture at 0C? J/K

Explanation / Answer

latent heat of vapourization =2260kJ/kg latent heat of fusion =334kJ/kg a) energy flowed out =28*2260 =63280J b)mass of ice melts =63280/334000 =0.19 kg =190 gms c)change in entropy of steam water= -63280/373 = -169.65J/K d) change in entropy of ice water =63280/273 =231.8 J/K

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