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

Melting involves an increase in potential energy and hence an increase in internal energy.