Heat needed to melt 1kg of ice at its melting point is:
A
40 J
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B
3.35×105 J
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C
80 J
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D
800 J
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Solution
The correct option is B3.35×105 J Heat needed to melt 1kg of ice is Heat = mass × latent heat. (Latent heat of ice is 333.55 kJ/kg) Heat = 1×333.55=3.35×105J