It is desired to melt a 0.780kg piece of Pb, starting with the sample at 51.0 degrees C. Determine the total quantity of heat required to do this? The melting point of Pb is 327.4 degrees C; its heat of fusion is 4.774 kJ/mol; its average heat capacity in the temperature range from 51-327.4 degrees C is 0.134 J/g*K.