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Question

Calculate the mass of steam at 100C needed to just melt 320 g of ice at 10C. The specific heat of ice =0.5calg1C1, latent heat of vaporization of steam =540calg1, specific heat of fusion of ice =80calg1.

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Solution

Heat required =320×12×10+320×80=1600+25600=27200cal
Let the mas os steam required = m
m×540=27200m=50.370gm

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