Add time:08/15/2019         Source:sciencedirect.com

The vaporization of pure yellow PbO(c) to provide reference data for lead titanate and other Lead oxide (cas 1314-41-6) containing compounds was investigated at temperatures of 810–1040 K. Thermodynamic quantities of sublimation and reaction enthalpies, and entropy were derived from the partial pressures of gaseous Pb, PbO, and O2 over pure yellow lead oxide. The experimental sublimation enthalpy of Pb from PbO(c) was ΔsubH930K0(Pb)=(206±5)kJmol−1, ΔsubH298K0(Pb)=(215±5)kJmol−1 and for PbO was ΔsubH930K0=(223±3)kJmol−1, ΔsubH298K0=(236±3)kJmol−1. The enthalpy, entropy and Gibbs energy of the following reactions were determined by 2nd and 3rd law analysis at T = 930 K:ΔrHT0 kJ mol−1ΔrST0J mol−1 K−1ΔrGT0 kJ mol−1PbO(c) = PbO(g)223 ± 395 ± 1137 ± 4PbO(c) = Pb(g) + 0.5O2(g)312 ± 6136 ± 1186 ± 5PbO(g) = Pb(g) + 0.5O2(g)86 ± 240 ± 150 ± 2

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