JEE Main 2025 Physics question

Physics Thermodynamics JEE Main 2025

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

(1)Internal energy of ice-water system remains unchanged
(2)Internal energy of the ice-water system decreases
(3)Positive work is done by the ice-water system on the atmosphere
(4)Positive work is done on the ice-water system by the atmosphereCorrect

Answer: (4)

Solution

Melting requires heat, increasing internal energy; volume decreases so atmosphere does positive work on the system.

Question ID VK-002676