During the melting of a slab of ice at 273K at atmospheric pressure,

Options

A. positive work is done by the ice-water system on the atmosphere.
B. positive work is done on the ice-water system by the atmosphere.
C. the internal energy of the ice-water system increases.
D. the internal energy of the ice-water system decreases.

Answer

B, C

Explanation

(b,c)
There is a decrease in volume during melting of an ice slab
at 273K. Therefore, negative work is done by ice-water
system on the atmosphere or positive work is done on the
ice-water system by the atmosphere . Hence, option (b) is
correct.