Auxiliary and Specific Data Tables

Selected Gas-Phase Equilibrium Constants at 25^oC

James Richard Fromm

Equilibrium	Kp (Pa)	Kp (atm)
H2 + I2 2HI	6.17 x 10+2	6.17 x 10+2
2HI H2 + I2	1.62 x 10-3	1.62 x 10-3
2HBr H2 + Br2	5.33 x 10-20	5.33 x 10-20
2HCl H2 + Cl2	4.06 x 10-34	4.06 x 10-34
2HF H2 + F2	1.88 x 10-96	1.88 x 10-96
N2 + 3H2 2NH3	5.81 x 10-5 Pa-2	5.96 x 10+5 atm-2
N2O4 2NO2	7.92 x 10+5 Pa	7.82 atm
2H2 + O2 2H2O	1.23 x 10+75 Pa-1	1.24 x 10+80 atm-1
N2 + O2 2NO	4.71 x 10-31	4.71 x 10-31
2NO + O2 2NO2	2.23 x 10+7 Pa-1	2.26 x 10+12 atm-1
CO + 2H2 CH3OH	2.24 x 10-6 Pa-2	2.30 x 10+4 atm-2
CO + H2O CO2 + H2	1.03 x 10+5	1.03 x 10+5
CH4 + H2O CO + 3H2O	7.93 x 10+34 Pa+2	7.73 x 10+24 atm+2
2SO2 + O2 2SO3	6.77 x 10+19 Pa-1	6.86 x 10+24 atm-1
2HCl + O2 H2O + Cl2	4.50 x 10+1 Pa-1	4.56 x 10+6 atm-1
CO + Cl2 COCl2	6.51 x 10+6 Pa-	6.60 x 10+11 atm-1
3O2 2O3	6.55 x 10-63 Pa-1	6.64 x 10-58 atm-1
PCl3 + Cl2 PCl5	3.29 x 10+1 Pa-1	3.33 x 10+6 atm-1
I2 + Cl2 2ICl	8.19 x 10+1	8.19 x 10+1
CH4 + H2O CO + 3H2O	7.93 x 10+34 Pa+2	7.73 x 10+24 atm+2
2NO + Br2 2NOBr	2.80 x 10-4 Pa-1	2.84 x 10+1 atm-1
SO2Cl2 SO2 + Cl2	2.95 x 10+8 Pa	2.91 x 10+3 atm

Notes to Table: The values in this table are calculated by the undersigned from tables of thermodynamic properties of pure substances. The method of calculation and examples are given in another section. Constants have the nominal units given; those without units have no nominal units.

Main Tables

Auxiliary Tables