Question

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

• A. positive work is done by 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 decreases
• D. the internal energy of the ice-water system remains same

Answer 1

Answer: (B)

Density of ice is less than that of water. Therefore, on melting, volume decreases. So, the work done on the ice-water system by the atmosphere is positive.