Ice at –20ºC is added to 50 g of water at 40ºC. When the temperature of the mixture reaches 0ºC, it is found that 20 g of ice is still unmelted. The amount of ice added to the water was close to (Specific heat of water = 4.2 J/g/ºC
Specific heat of Ice = 2.1 J/g/ºC
Heat of fusion of water at 0ºC = 334 J/g)
(1) 60 g
(2) 100 g
(3) 40 g
(4) 50 g
