Question

69 An alloy (in liquid state) of mass 100 g and at 242
°C is transferred into a copper calorimeter of water
equivalent 40 g containing 200 g of water. When the
equilibrium is reached, the temperature of calorim-
eter and water rises from 12.1 °C to 22.1 °C. Now,
when the experiment is repeated with the given alloy
in the solid state, at the same temperature of 242 °C,
by dropping it in the calorimeter, the equilibrium
temperature was found to be 14 °C. Find the latent
heat of fusion of the given alloy,
please please help me
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