ICSE Class 10 Physics 2013 Solved Paper

Question : 54

Total: 70

Why does a bottle of soft drink cool faster when surrounded by ice cubes than by ice cold water, both at 0∘C ?

Solution:

Because 1‌gm of ice at 0∘C takes 336J of heat energy from the drink to melt into water at 0∘C. Thus drink loses an additional 336J of heat energy for 1g ice at 0∘C than for 1‌gm ice-cold water at 0∘C. Therefore cooling produced by 1g ice at 0∘C is more than that by 1‌gm water at 0∘C.

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