Equilibrium
?G° at 900 K
(cal)
log K
log P02
Mo + O2 ? MoO2
-102,100
24.8
-24.8
MoO2 + 1/2 O2 ? MoO3
-21,150
5.1
-10.3
Mo + 2 SO2 ? MoS2 + 2 O2
89,830
-21.8
-10.9 + log PSO2
MoS2 + 3 O2 ? MoO2 + 2 SO2
-191,920
46.6
-15.5 + 2/3 log PSO2
MoS2 + 3.5 O2 ? MoO3 + 2 SO2
-213,070
51.7
-14.8 + 0.571 log PSO2
(1) <Mo> + [S2] ? <MoS2>
?G°1 = -85,870 + 37.33 T
(2) <Mo> + [O2] ? <MoO2>
?G°2 = -140,100 - 4.6 T log T + 55.8 T
(3) <MoO2> + 1/2 [O2] ? <MoO3>
?G°3 = -38,700 + 19.5 T
(4) <S2> + 2 [O2] ? 2 <SO2>
?G°4 = -173,240 + 34.62 T