Question
250 g of water at 30℃ is contained in a copper vessel of mass 50g. Calculate the mass of ice required to bring down the temperature of the vessel and its contents to 5℃. Given: specific latent heat of fusion of ice = 336×103Jkg−1, specific heat capacity of copper = 400Jkg−1K−1, specific heat capacity of water = 4200Jkg−1K−1 .