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  4. A block of ice of mass mg is at -5° C at atmospheric pressure. It is given 420J of heat so that the ice starts melting. Finally, when the ice-water mixture is in equilibrium, it is found that 1g of ice has melted. Assuming there is no other heat exchange in the process, the value of m is [heat capacity of ice = 2100JKg- 1° C- 1 and latent heat of ice = 3.36 × 105 Jkg- 1 ]

Q. A block of ice of mass is at at atmospheric pressure. It is given of heat so that the ice starts melting. Finally, when the ice-water mixture is in equilibrium, it is found that of ice has melted. Assuming there is no other heat exchange in the process, the value of is
[heat capacity of ice = and latent heat of ice = ]

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Solution:

The heat capacity given in the question is really the specific heat. Now applying the heat exchange equation:

Solving this equation, we get

The correct answer is 8.

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