100g of water is heated from 30^@C to 50...

100g of water is heated from `30^@C to 50^@C`. Ignoring the slight expansion of the water, the change in its internal energy is (specific heat of water is `4184J//kg//K`):

4.2 KJ

8.4 KJ

84 KJ

2.1 KJ

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200 g of water is heated from 40^(@)C "to" 60^(@)C . Ignoring the slight expansion of water , the change in its internal energy is closed to (Given specific heat of water = 4184 J//kg//K ):

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If 1000kg of water is heated from 0^(@)C to 100^(@)C , calculate the increase in mass of water.

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400 kg of water is heated from 30^(@) C to 100^(@)C . What will be the increase in mass of water ? Take specific heat of wateer = 4.2 xx10^(3) " J kg"^(-1).^(@)C^(-1) .

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