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Q .     A piece of ice ( specific heat capacity `= 2100 Jkg^(–1)°C^(–1)` and latent heat `= 3.36 × 10^5 Jkg^(–1)`) of mass m gram is at `–5°`C at atmospheric pressure. It is given `420 J` of heat so that the ice starts melting. Finally when the ice-water mixture is in equilibrium, it is found that 1 g of ice has melted. Assuming there is no other heat exchange in the process, the value of `m` is (2010)


JEE 2010
A

`8 g`

B

`16 g`

C

`12 g`

D

`4 g`

HINT

Heat supplied to ice = Increasing the temperature of ice from `-5^oC to 0^oC`, and in melting 1 g ice.
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