Question

3. You have a 2.00 kg block of lead. Lead melts at 327.5°C. CPb = 130.0 , and Hf for lead is 2.04 × 104 J/kg. Say you start at room temperature (25.0°C). How much heat must you transfer to melt all the lead?

Answer 1

Use the specific heat of lead to determine how much heat must be used to get it from 25C to 327.5C, then add enough heat based on the heat of fusion to convert it from solid to liquid without raising its temperature further.