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Question

Heat energy required to melt 10 kg ice at its melting point will be _____. (The latent heat of fusion of water = 333.55 kJ kg1).


A

2.33×106J

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B

3.33×106 J

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C

4.33×105J

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D

4.33×104J

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Solution

The correct option is B

3.33×106 J


Given:
Mass of ice, m=10 kg
Latent heat, L=333.55 kJ/kg
Heat needed to melt 1 kg of ice is equal to its latent heat of fusion. (Since, there is a phase change)
Heat required = m×L
10×333.55=3.33×103 kJ
1000 J=1 kJ
3.33×103 kJ=3.33×106 J.

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