IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Carbon dioxide with Water

Components:
   (1) Carbon dioxide; CO2; [124-38-9]  NIST Chemistry WebBook for detail
   (2) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Ellis, A.J., Am. J. Sci. 1959, 257, 217-34.

Variables:
   Temperature = 387 K to 621 K
   Pressure = 0.506 MPa to 16.40 Mpa

Prepared By:
   C.L. Young

Experimental Data:   (Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)


t/°C	T/K	Pressure [atm]	Pressure [atm]	Pressure [atm]	Henry's law constant, K [atm]	Henry Constant Note	Mole Fraction (x₁)
114	387	5.00	3.41	1.59	4800	a	0.710
128	401	6.00	3.53	2.47	4640	a	0.761
147	420	8.25	3.80	4.45	4940	a	0.769
175	448	12.85	4.17	8.68	4960	a	0.841
182	455	14.1	3.89	10.21	4680	a	0.831
192	465	16.7	3.93	12.77	3890	a	1.01
195	468	17.5	3.87	13.63	4040	a	0.958
208	481	22.0	4.14	17.86	3770	a	1.10
227	500	30.1	4.45	25.65	4080	a	1.09
228	501	30.7	4.4	26.3	4160	a	1.06
228	501	30.3	4.0	26.3	3750	a	1.07
231	504	32.3	4.2	28.1	3840	a	1.09
232	505	32.6	4.3	28.3	3980	a	1.08
255	528	47.1	4.9	42.2	4060	a	1.2
257	530	48.5	4.9	43.6	3980	a	1.2
291	564	78.5	4.8	73.7	3150	a	1.5
298	571	85.9	4.4	81.5	2690	a	1.6
305	578	94.5	4.6	89.9	2780	a	1.7
314	587	105.8	3.9	101.9	2030	a	1.9
322	595	117.1	4.0	113.1	2250	a	1.8
343	616	152.3	4.2	148.1	1870	a	2.2
348	621	161.9	4.3	157.6	1860	a	2.3


t/°C	T/K	Pressure [atm]	Pressure [atm]	Pressure [atm]	Henry's law constant, K [atm]	Henry Constant Note	Mole Fraction (x₁)
163	436	7.85	1.31	6.54	4730	a	0.28
179	452	11.25	1.64	9.61	4530	a	0.36
197.5	470.7	14.7	1.55	13.15	4220	a	0.37
199	472	16.3	1.37	14.93	3760	a	0.36
222	495	25.2	1.58	23.62	3640	a	0.43
224	497	26.0	1.47	24.53	3890	a	0.38
227	500	27.5	1.56	25.94	3900	a	0.40
233	506	30.4	1.44	28.96	3550	a	0.41
242.5	515.7	36.0	1.7	34.3	3730	a	0.46
244	517	36.8	1.6	35.2	3530	a	0.45
287	560	71.6	1.8	69.8	3310	a	0.54
288	561	72.5	1.7	70.8	3250	a	0.52
317	590	106.7	1.7	105.0	2600	a	0.65
319	592	111.1	1.8	109.3	2680	a	0.67

Notes:
   ^a  K_H = Henry's law coefficient.

Method/Apparatus/Procedure:
   Static bomb of approximately 100 cm³ capacity. Heated in electric tube furnace. Liquid volume of approximately half to two thirds bomb volume. Samples of mixture analyzed by absorbing water in Anhydrone and carbon dioxide in carbsorb. Details in source.

Source and Purity of Materials:
   Carbon dioxide generated in apparatus by reaction of sodium bicarbonate and hydrochloric acid.
Two series studied:
Series A: 0.02 moles NaHCO₃; 0.00797 moles HCL; 42 or 52 cm³ of water.
Series B: 0.007 moles NaHCO₃; 0.00302 moles HCl; 55 cm³ of water.

Estimated Errors:
   Solubility: δx₁ = ± 4 % (estimated compiler).
   Temperature: δT/K = ± 2.0