We take a 1kg of ice from the freezer at the temperature -10C, and add a boiling water to melt it.

The specic heat capacity of water is 4.2 kJ/kg.K, specic heat capacity of ice is 2.1 kJ/kg.K and the

latent heat of fusion is 334 kJ/kg.

a) What is the mass of boiling water we need to melt all ice?

b) What is the nal temperature if we mix the ice from the freezer with 5kg of boiling water?