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1Calculate the standard heat of formation of solid PbO from liquid Pb and O2 gas at 530°C. The melting point of lead is 327°C and its latent heat of fusion is 1.15 kcal/mole. The molar heat capacity at a constant pressure of liquid Pb, Cp(Pb) is 32.43-3.10×10-3T J/K/mol. ΔΗ°298,Pbo = -219.24 kJ/mol. Cp,PbO = 44.35 + 16.74x10-3 T J/K/mol Cp,Pb = 23.58 + 9.75x10-3 J/K/mol Cp,O2 = 29.96+4.184x10-3T – 3.67 x 105T-2 J/K/mol.
Sagot :
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