In 1750, Joseph Black performed an experiment that eventually led to the discovery of enthalpies of fusion. He placed two samples of water, each of mass 150. g, at 0.00 °C (one ice and one liquid) in a room kept at a constant temperature of 5.00 °C. He then observed how long it took for each sample to reach its final temperature. The liquid sample reached 5.00 °C after 30.0 min. However, the ice took 10.5 h to reach 5.00 °C. He concluded that the difference in time that the two samples required to reach the same final temperature represented the difference in heat required to raise the temperatures of the samples. Use Black’s data to calculate the enthalpy of fusion of ice in kilojoules per mole. Use the known heat capacity of liquid water.