Question

A slab of ice at 273K and at atmospheric pressure melts. (a) What is the nature of the work done
on the ice-water system by the atmosphere? (b) What happens to the internal energy of ice-water
system?

Answer 1

Answer:

When a slab of ice at 273K melts, volume of water formed is less than the volume of ice melted ie, volume decreases. Therefore, work done by ice-water system is negative or in other words positive work is done by the atmosphere on the ice-water system. This increases the internal energy of ice-water system.

Explanation:

Answer 2

(a) The volume of the ice decreases on melting. Hence the work done by the atmosphere on The ice – water system is positive in nature. (b) Since heat is absorbed by the ice during melting, the internal energy of the ice- water system increases.

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