Heat energy is supplied at a constant rate to 100g of ice at 0°C. The ice is converted into water at 0°C in 2minutes. How much time will be required to raise the temperature of water from 0°C to 20°C?
[Given : sp. heat capacity of water – 4.2Jg-1°C-1] sp. latent heat of ice = 336Jg-1.