To calculate the amount of heat required to melt 25 g of ice at 0C, we can use the formula:Q = mass enthalpy of fusionwhere Q is the heat required, mass is the mass of ice, and enthalpy of fusion is the energy required to change 1 gram of ice to water at 0C.Given:Mass of ice = 25 gEnthalpy of fusion = 333 J/gNow, we can plug in the values into the formula:Q = 25 g 333 J/gQ = 8325 JTherefore, the amount of heat required to melt 25 g of ice at 0C is 8325 Joules.