Lead is a soft, dense metal with a specific heat of 0.028 kcal/kg·C°, a melting point of 328.0°C, and a heat of fusion of 5.5 kcal/kg. How much heat must be provided to melt a 202.2 kg sample of lead with a temperature of 20.0°C?
physical science - DrBob222, Tuesday, October 12, 2010 at 11:23pm
q1 = heat to raise temperature from 20 C to 328.
q1 = mass Pb x specific heat Pb x (328-20).
q2 = heat to melt Pb at 328.
q2 = mass Pb x delta H fusion.
Total heat = q1 + q2.
physical science - Delice, Friday, October 4, 2013 at 10:31am