Question: how much energy is required to melt 1.5 kg of lead answers.com?
Answer: Explanation: The enthalpy of fusion (energy need to change state from solid to liquid) of lead is 4.77 kJ/mol (so it takes 4.77 kJ to melt one mole of lead). We need to find the number of moles ( n ) of lead in 1.5kg ( m ).