1. When doing an experiment to find the specific latent heat of fusion of liquid nitrogen, you find that 100kJ of heat must be removed to freeze 3.8kg of nitrogen at its freezing point. What value will you get for the specific latent heat of fusion of nitrogen? [2 marks]

1. A 0.20 kg piece of copper at 375.0^oC is submerged in 0.50 kg of water at 18.0^oC to be cooled quickly. Copper is380 J/kg.Determine the final temperature of the copper and water. [4 marks]

1. How much heat does a refrigerator freezer have to remove from 0.10 kg of water at 22.0^oC to make ice at -4.0^oC? (*this requires you to think about what happens in relation to a cooling curve, there is more than one step to solve this problem). [6 marks]