Selected Equilibrium Constants

Selected Equilibrium Constants


REACTION Kc or Kp T
ANTIMONY COMPOUNDS
SbC5(g)=SbC3(g) + C2(g) Kp = 2.5 x 10-2 248C
CARBON COMPOUNDS
CO(g) + 2H2(g)= CH3OH(g) Kc = 14.5(c) 500 K
CaCO3(s) = CaO(s) + CO2(g) K=1.9 x 10-23 298 K
K=1.0 1200 K
C(s) + H2O(g)= CO(g) + H2(g) K=1.6 x 10-21 298 K
K=10.0 1100 K
C(graphite) + CO2(g)= 2CO(g) Kc = 0.64 1200 K
CO2(g) + H2(g) = CO(g) + H2O(g) Kc = 1.4 1200 K
C(graphite) + 1/2 O2(g)= CO(g) Kc = 1 x 103 1200 K
CO(g) + C2(g) = COC2(g) Kc = 1.2 x 103 668 K
CO(g) + H2O(g)= CO2(g) + H2(g) Kc = 23.2 ?
2CH4(g) = C2H2(g) + 3H2(g) Kc = 0.154 2000 K
2COF2(g) = CO2(g) + CF4(g) Kc= 2.00 1000C
COC2(g) =CO(g) + C2(g) Kp = 4.44 x 10-2 395C
IODINE COMPOUNDS
H2(g) + I2(g)= 2HI(g) Kc = 50.2 445C
H2(g) + I2(g) = 2HI(g) Kp = 6.9 x 101 340C
I2(g) = 2I(g) Kc = 1.1 x 10-2 1200C
NITROGEN COMPOUNDS
N2(g) + 1/2 O2(g)= N2O(g) Kc= 2.4 x 10-18
N2(g) + O2(g) = 2NO(g) Kc = 4.1 x 10-31
N2(g) + O2(g) = 2NO(g) Kc = Kp = 1.7 x 10-3 2300K
N2O(g) + 1/2 O2(g)= 2 NO(g) Kc = 1.7 x 10-13
2NO(g) + Br2(g) = 2NOBr(g) Kc = 1.32 x 10-2 1000 K
N2O4(g) = 2NO2(g) Kc = 4.61 x 10-3 25C
HCONH2(g)= NH3(g) + CO(g) Kc = 4.84 400 K
N2(g) + 3H2(g)= 2NH3(g) Kc= 152 500 K
N2(g) + 3H2(g) = 2NH3(g) Kp= 4.34 x 10-3 300C
Kp = 1.45 x 10-5 500C
Kp = 2.25 x 10-6 600C
OXYGEN COMPOUNDS
2H2(g) + O2(g) = 2H2O(g) 3.2 x 1081 25C
PHOSPHORUS COMPOUNDS
PC5(g) = PC3(g) + C2(g) Kc = 3.8 x 10-2 250C
SULFUR COMPOUNDS
1/8 S8(s) + O2(g)= SO2(g) K=4.2 x 1052 25C
2 SO2(g) + O2(g) = 2 SO3(g) Kc= 280 1000 K
2 H2S(g) = 2 H2(g) + S2(g) Kp = 0.012 1065C
2 H2(g) + O2(g) = 2 H2O() K=1.4 x 1083 298 K
NH4HS(s) = NH3(g) + H2S(g) Kp = 0.108 25C
2H2S(g) = 2H2(g) + S2(g) Kc = 1.0 x 10-6 1000 K
SO2C2(g) = SO2(g) + C2(g) Kp = 2.9 x 10-2 303 K