SOLUTION. The specific heat of zinc is found from the table to be .0956. Hence, the number of heat units necessary to raise it to the melting point is 10 X (680 — 60) × .0956 = 592.72. Latent heat of fusion = 50.63 heat units. Hence, the total number of heat units required is 592.72 + 10 X 50.63 1,099.02. EXAMPLE.-A wrought-iron bar 22 ft. long is heated from 70° to 300°. How much will it lengthen? SOLUTION. 22 × (300—70) X .00000686 .41654 in. = .0347116 ft. = ALLOYS. == Silver, T= : Tin, NOTE.-A = Antimony, B = Bismuth, C = Copper, G. Gold, I Iron, L = Lead, N = Nickel, S Z = Zinc. = Proportions. 2 C, 1Z 32 C, 10 Z, 1.5 T 20 C, 1.25 Z, 2.5 T 25 C, 2 Z, 4.5 T SC, 1 T |