A heater supplies heat at the rate of 800 J/s. Find the time required to convert 50g of ice at -20°C into superheated steam at 140°C. (Given: Specific heat of ice = 2.1J/g, latent heat of ice = 340J/gm, latent heat of steam = 2240J/gm, specific heat of steam = 2.1J/gm and specific heat of water = 4.2J/gm.)
