Steam at 1000C is passed into 1.1 kg of water contained in a calorimeter of water equivalent 0.02 kg at 150C till the temperature of the calorimeter and its contents rises to 800C. The mass of the steam condensed in kg is

Heat is lost by steam in two stages (i) for change of state from steam at 1000C to water, (ii) to water at 800C is m×1×(100-80), where m is the mass of steam condensed.Total heat lost by steam = m × 540 + m×20 = 560m cal Heat gained by calorimeter and its contents = (1.1 + 0.02) ×(80-15) = 1.12 ×65 calUsing principle of calorimetryHeat gained = heat lost560 m = 1.12 × 65m = 0.130 gm