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28 Jul 2011 20:41:26 IST

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the change of energy on freezing 1 kg of liquid water at 1 atm presaure is

Chemistry

the change of energy on freezing 1 kg of liquid water at 1 atm presaure is

Ans -333.4 KJKg^-1

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djdylan2000. bits goa eee

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28 Jul 2011 21:14:36 IST

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thats the latent heat of fusion of ice.

Bodhisattwa Purkayastha

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28 Jul 2011 22:54:58 IST

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using the latent heat of fusion of ice i.e. 80 cal/g or (80x4.2=) 336 J/g / or 333.4 J/g (approx)

energy required for 1 kg of water to freez = 33.4x 1000= 333.4 KJ

which can be accounted as 333.4 KJ Kg^-1 .

since the energy is derived out from the liquid system, -ve sign is used i.e. total change in energy is negative.

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