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:
   Murray, C. N.; Riley, J. P., Deep-Sea Res. 1971, 18, 533-41.

Variables:
   Temperature = 274.19 K to 308.15 K
   Pressure = 101.325 kPa

Prepared By:
   Rosa Crovetto

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


t/°C	T/K	Temp Note	Pressure [atm]	Pressure (compiler) [bar]	α	α Note	Mole Fraction (x₁)	x₁ Note
1.04	274.19	a	1.000	1.020	1.6471	b	13.31	a
5.00	278.15	a	1.000	1.022	1.4199	b	11.48	a
10.00	283.15	a	1.000	1.026	1.1926	b	9.645	a
15.00	288315	a	1.000	1.030	1.0100	b	8.174	a
20.00	293.15	a	1.000	1.037	0.8652	b	7.009	a
25.00	298.15	a	1.000	1.045	0.7519	b	6.099	a
32.00	305.15	a	1.000	1.061	0.6336	b	5.150	a
35.00	308.15	a	1.000	1.070	0.5905	b	4.805	a

Notes:
   ^a  Calculated by the compiler.
   ^b  Bunsen coefficient [cm³ (STP) cm^-3 atm^-1].
The results are the mean of at least three measurements.

Method/Apparatus/Procedure:
   Equilibrated solutions were prepared by bubbling gas through magnetically stirred water till equilibrium was reached.
The CO₂ content was determined by acidifying the solutions and after degassing then, precisely weighing the evolved CO₂.

Source and Purity of Materials:
   (1) 99.9%, tested by mass spectrometry.
   (2) Conductivity water, degassed.

Estimated Errors:

   Temperature: δT/K = ± 0.02 (by authors)