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25.Find the change in the entropy in the following process 100 gm of ice at 0°C melts when dropped in a bucket of water at 50°C (Assume temperature of water does not change) 

(a)  – 4.5 cal/K                                 (b)  + 4.5 cal/K

(c)   +5.4 cal/K                                 (d) – 5.4 cal/K

Answer-b

(18)

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