Auxiliary and Specific Data Tables

Selected Gas-Phase Equilibrium Constants at 25oC

James Richard Fromm


Equilibrium Kp (Pa) Kp (atm)
H2 + I2 larrow.GIF (55 bytes)rarrow.gif (63 bytes) 2HI 6.17 x 10+2 6.17 x 10+2
2HI larrow.GIF (55 bytes)rarrow.gif (63 bytes) H2 + I2 1.62 x 10-3 1.62 x 10-3
2HBr larrow.GIF (55 bytes)rarrow.gif (63 bytes) H2 + Br2 5.33 x 10-20 5.33 x 10-20
2HCl larrow.GIF (55 bytes)rarrow.gif (63 bytes) H2 + Cl2 4.06 x 10-34 4.06 x 10-34
2HF larrow.GIF (55 bytes)rarrow.gif (63 bytes) H2 + F2 1.88 x 10-96 1.88 x 10-96
N2 + 3H2 larrow.GIF (55 bytes)rarrow.gif (63 bytes) 2NH3 5.81 x 10-5 Pa-2 5.96 x 10+5 atm-2
N2O4 larrow.GIF (55 bytes)rarrow.gif (63 bytes) 2NO2 7.92 x 10+5 Pa 7.82 atm
2H2 + O2 larrow.GIF (55 bytes)rarrow.gif (63 bytes) 2H2O 1.23 x 10+75 Pa-1 1.24 x 10+80 atm-1
N2 + O2 larrow.GIF (55 bytes)rarrow.gif (63 bytes) 2NO 4.71 x 10-31 4.71 x 10-31
2NO + O2 larrow.GIF (55 bytes)rarrow.gif (63 bytes) 2NO2 2.23 x 10+7 Pa-1 2.26 x 10+12 atm-1
CO + 2H2 larrow.GIF (55 bytes)rarrow.gif (63 bytes) CH3OH 2.24 x 10-6 Pa-2 2.30 x 10+4 atm-2
CO + H2O larrow.GIF (55 bytes)rarrow.gif (63 bytes) CO2 + H2 1.03 x 10+5 1.03 x 10+5
CH4 + H2O larrow.GIF (55 bytes)rarrow.gif (63 bytes) CO + 3H2O 7.93 x 10+34 Pa+2 7.73 x 10+24 atm+2
2SO2 + O2 larrow.GIF (55 bytes)rarrow.gif (63 bytes) 2SO3 6.77 x 10+19 Pa-1 6.86 x 10+24 atm-1
2HCl + O2 larrow.GIF (55 bytes)rarrow.gif (63 bytes) H2O + Cl2 4.50 x 10+1 Pa-1 4.56 x 10+6 atm-1
CO + Cl2 larrow.GIF (55 bytes)rarrow.gif (63 bytes) COCl2 6.51 x 10+6 Pa- 6.60 x 10+11 atm-1
3O2 larrow.GIF (55 bytes)rarrow.gif (63 bytes) 2O3 6.55 x 10-63 Pa-1 6.64 x 10-58 atm-1
PCl3 + Cl2 larrow.GIF (55 bytes)rarrow.gif (63 bytes) PCl5 3.29 x 10+1 Pa-1 3.33 x 10+6 atm-1
I2 + Cl2 larrow.GIF (55 bytes)rarrow.gif (63 bytes) 2ICl 8.19 x 10+1 8.19 x 10+1
CH4 + H2O larrow.GIF (55 bytes)rarrow.gif (63 bytes) CO + 3H2O 7.93 x 10+34 Pa+2 7.73 x 10+24 atm+2
2NO + Br2 larrow.GIF (55 bytes)rarrow.gif (63 bytes) 2NOBr 2.80 x 10-4 Pa-1 2.84 x 10+1 atm-1
SO2Cl2 larrow.GIF (55 bytes)rarrow.gif (63 bytes) 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


Copyright 1997 James R. Fromm