2 kg of ice at -20degree centigrade is mixed with 5 kg of water at 20degree centigrade in an insulating vessel having a negligible heat capacity. The final mass of water in the vessel. ( the specific heat of water and ice are 1k cal/kg degree centigrade and 0.5 k cal/kg degree centigrade respectively ant the latent heat of fusion of ice is 80 k cal/kg) is 1) 7kg 2) 6kg 3) 4kg 4) 2kg
2 kg of ice at -20degree centigrade is mixed with 5 kg of water at 20degree centigrade in an insulating vessel having a negligible heat capacity. The final mass of water in the vessel. ( the specific heat of water and ice are 1k cal/kg degree centigrade and 0.5 k cal/kg degree centigrade respectively ant the latent heat of fusion of ice is 80 k cal/kg) is
1) 7kg 2) 6kg 3) 4kg 4) 2kg











