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How much heat must be removed by a refrigerator from 500g of water at 25 °C to totally convert it to ice cubes at 0°C? [Specific heat capacity of water = 4200J kg-1oC-1; Specific latent heat of fusion of ice = 334,000 Jkg-1]
In an experiment, a student uses an electric heater to heat 2.0 kg of ice until it becomes water at 20°C. The initial temperature of the ice is -10°C. Find the amount of heat energy supplied by the electric heater in this process. (Specific heat capacity of water = 4200 Jkg-1°C-1; Specific heat capacity of ice = 2100 Jkg-1°C-1; Specific latent heat of fusion of water = 336,000 Jkg-1)
How much heat energy is needed to completely convert a water of mass 1kg at 50°C to steam at 100°C? (Specific heat capacity of water = 4200 Jkg-1°C-1; Specific latent heat of vaporisation of water = 2,260,000 Jkg-1)
Figure above shows the experiment set up to determine the specific latent heat of fusion. What is the purpose of the control set in the experiment?