हिंदी

Water in Lakes and Ponds Do Not Freeze at Once in Cold Countries. Give a Reason is Support of Your Answer. - Physics

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प्रश्न

Water in lakes and ponds do not freeze at once in cold countries. Give a reason is support of your answer.

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उत्तर

The specific latent heat of fusion of ice is sufficiently high (=336 J g-1), and so to freeze water, a large quantity of heat has to be withdrawn. Hence, it freezes slowly and thus keeps the surroundings moderate.

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2014-2015 (March) Science Paper 1
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