To calculate the amount of heat required to melt the ice, we need to first determine the number of moles of ice present. The molecular weight of water H2O is 18.015 g/mol.1. Calculate the number of moles of ice:moles of ice = mass of ice / molecular weight of watermoles of ice = 15 g / 18.015 g/molmoles of ice 0.833 moles2. Calculate the amount of heat required to melt the ice:heat required = moles of ice enthalpy of fusionheat required = 0.833 moles 6.01 kJ/molheat required 5.01 kJThe total amount of heat required to completely melt the 15 grams of ice at 0C is approximately 5.01 kJ.