5.5 SOURCES OF INFORMATION ON AG(2) S.J.T.U. Phase Transformation and Applications Table 5.1 Standard Gibbs Free Energy Changes Reaction A B C Range (K) 2A1(s)+O2(g)=A12O3(s) -1,676,990 -7.23 +366.7 298-923 2A1)+O2(g)=A12O3(s) -1,697,700 -15.69 +385.9 923-1800 C(s)+2H2(g)=CH4(g) -69.120 +22.26 -65.35 298-1200 C(s)+(g)=CO(g) -111,710 -87.65 298-2500 C(s)+O2(g)=CO2(g) -394.130 -0.84 298-2000 2Cao(s)+SiO2(s)=Ca2SiO(s) -120.360 -5.02 298-1700 2Co(s)+O2(g)=2CoO(s) -476,560 +155.23 298-1300 2Cr(s)+0(g)=Cr2O3(s) -1,120.270 +259.83 298-2100 4Cu(s)+O2(g)=2Cu2O(s) -339.000 -14.24 +247.0 298-1356 2Cu2O(s)+2(g)=2Cuo(s) -146.230 -11.08 +185.35 298-1300 H2(g)+O2(g)=H2O(g) -246,740 +54.81 298-2500 Mg(s)+02(g)=MgO(s) 603.960 -5.36 +142.05 298-923 Mg(1)+2(g)=Mgo(s) -608,140 -0.44 +112.76 923-1380 Mn(s)+2(g)=MnO(s) 384,720 +72.80 298-1500 Ni(s)+2(g)=NiO(s) 244,560 +98.53 298-1725 Pb(s)+02=PbO(s) 221,120 -6.27 +141.6 298-600 S2+202=2S02 -724,840 +144.85 298-2000 Si(s)+2Cl2→SiC1.(g) -616,300 -6.61 +178.24 298-600 Si(s)+SiO2(s)=2SiO(g) +666,930 25.07 一 508.6 298-1700 Si(s)+O2(g)=SiO2(s) -881,150 -5.45 +218.49 298-1700 Zr(s)+O2(g)=ZrO2(s) 1,087,800 -18.44 +322.17 298-2000 (s)=solid (1)=liquid (g)=gas Source:Values from O.Kubaschewski and E.L.L.Evans. SJTU Thermodynamics of Materials Spring 2006 ©X.J.Jin Lecture 9 Chemical equilibrium llPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2006 © X. J. Jin Lecture 9 Chemical equilibrium II 5.5 SOURCES OF INFORMATION ON ΔG˚ (2)