Alright, here's all the data I've collected:
the mass of a sample of ice: 32.28g
the initial temperature of the ice: 3.0°C
After having been melted, the temperature of the ice was 36.9°C (it was in a test tube which was placed in boiling water).
It was then poured into 50.0mL of tap water, which was initially 23.8°C
Once the two reached an equilibrium, the temperature was 30.9°C
Now what do I do to calculate the heat of fusion of ice?