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Dry saturated steam at 100'C is passed into 250gm of a mixture of ice and water contained in a calorimeter of thermal capacity 45J/K.When all the ice has just melted,the mass of the content of the calorimeter has increased by 10gm due to condensed steam.Assuming no heat exchange between the calorimeter and its surroundings,calculate (a) the mass of ice initially in the calorimeter,and
(b) the rise in temperature when the passage of steam is continued until a further 15gm of steam has condensed and the mixture is in thermal equilibrium.Specific latent heat of vapourization of water is 2 260 000 J/kg and Specific heat capacity of water 4200J/Kg.K.

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