To calculate the amount of heat energy required to melt the ice, we need to first determine the number of moles of ice and then use the enthalpy of fusion to find the energy.1. Calculate the number of moles of ice:The molecular weight of water H2O is 18.015 g/mol. moles of ice = mass of ice / molecular weight of watermoles of ice = 15 g / 18.015 g/molmoles of ice 0.833 mol2. Calculate the heat energy required to melt the ice:We can use the enthalpy of fusion Hfus to find the energy required to melt the ice.q = moles of ice Hfusq = 0.833 mol 6.01 kJ/molq 5.01 kJTherefore, the amount of heat energy required to melt 15 grams of ice at 0C is approximately 5.01 kJ.