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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heat of fusion of ice is sufficiently high (= 336 J g-1), and so to freeze water, a large quantity of heat has to be withdrawn.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.
संबंधित प्रश्न
The temperature of 170 g of water at 50°C is lowered to 5°C by adding a certain amount of ice to it. Find the mass of ice added.
Given: Specific heat capacity of water = 4200 J kg-1 °C-1 and specific latent heat of ice = 336000 J kg-1.
Write the approximate value of specific heat capacity of water in S.I. unit.
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