3. During the melting of a slab of ice at 273 K 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 increases
(d) The internal energy of the ice-water system decreases
Ans. b,c
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a