Heat energy required to melt 10kg ice at its melting point will be _____. (The latent heat of fusion of water = 333.55kJkg−1).
A
2.33×106J
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B
3.33×106J
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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
3.33×106J
Given: Mass of ice, m=10kg Latent heat, L=333.55kJ/kg Heat needed to melt 1kg of ice is equal to its latent heat of fusion. (Since, there is a phase change) Heat required = m×L ⇒10×333.55=3.33×103kJ 1000J=1kJ ∴3.33×103kJ=3.33×106J.