Which of the following endothermic process(es) is/are spontaneous? [AIPMT 2001] (a) Melting of i...

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Which of the following endothermic process(es) is/are spontaneous?
[AIPMT 2001]
(a) Melting of ice
(b) Evaporation of water
(c) Heat of combustion
(d) Both (a) and (b)
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