A sufficient amount of pure copper is to be heated for casting a large plate in an open mold. The plate has dimensions: L = 20 in, W = 10 in, and D= 3 in Compute the amount of heat that must be added to the metal to heat it to a temperature of 2150 F for pouring. Assume that the amount of metal heated will be 10% more than needed to fill the mold cavity. Properties of the metal are: density = 0.324 Ibm/in', melting point 1981 F, specific heat of the metal = 0.093 Btu/lbm-F in the solid state and 0.090 Btu/Ibm-F in the liquid state; and heat of fusion = 80 Btu/bm