To calculate the amount of energy required to melt 50 grams of ice at 0C, we first need to determine the number of moles of ice present. The molar mass of water H2O is 18.015 g/mol.Number of moles = mass / molar massNumber of moles = 50 g / 18.015 g/mol = 2.776 molesNow, we can use the enthalpy of fusion for water 6.01 kJ/mol to calculate the energy required to melt the ice.Energy required = number of moles enthalpy of fusionEnergy required = 2.776 moles 6.01 kJ/mol = 16.68 kJTherefore, 16.68 kJ of energy is required to melt 50 grams of ice at 0C.