1 A 5 g piece of ice at -20°C is put into 10 g water at 30°C. Assuming that the heat exchange is only
between the water and ice, find the final temperature of the mixture (10). Specific heat capacity of
ice and water are respectively 2100 J Kg-1 °C-1 and 4200 J Kg-1 °C-1, while the latent heat of
fusion of ice is 3.36 x 105 J Kg-1.​