Section: 5 | Solubility of Carbon Dioxide in Water at Various Temperatures and Pressures |

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SOLUBILITY OF CARBON DIOXIDE IN WATER AT VARIOUS TEMPERATURES AND PRESSURES

Given its importance, the solubility of CO₂ in water is presented in two tables. Table 1 contains the mole fraction solubility X₁ of CO₂ in water (column 2) for common temperatures (column 1) at a CO₂ partial pressure of 101.325 kPa. The values in this table are taken from Ref. 1, the International Union of Pure and Applied Chemistry “Solubility Data Series” and comprise evaluated data fitted to a Henry’s Law Constant equation described in this reference. The right-hand column of Table 1 contains the standard deviation and temperature range of applicability.

Table 2 gives the solubility of CO₂ in water, expressed as a mole fraction of CO₂ in the liquid phase, for pressures up to 100 kPa and temperatures of 0 to 100 °C. (Note that 1 standard atmosphere equals 101.325 kPa.) Refs. 2-4 give data over a wider range of temperatures and pressures. The estimated uncertainty is about 2%.

CO₂ reacts with water and all solubility values are for bulk solubilities; i.e., all chemical species of CO₂ and its reaction products with water are included in both tables.

References

Scharin, P., Ed., IUPAC Solubility Data Series, Vol. 62, Carbon Dioxide in Water and Aqueous Electrolyte Solutions, Oxford University Press, Oxford, England, 1996.
Carroll, J. J., Slupsky, J. D., and Mather, A. E., J. Phys. Chem. Ref. Data, 20, 1201, 1991. [https://doi.org/10.1063/1.555900]
Fernandez-Prini, R. and Crovetto, R., J. Phys. Chem. Ref. Data, 18, 1231, 1989. [https://doi.org/10.1063/1.555834]
Crovetto, R., J. Phys. Chem. Ref. Data, 20, 575, 1991. [https://doi.org/10.1063/1.555905]

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TABLE 1. Solubility of CO₂ in Water at Common Temperatures and 1 atm Partial Pressure of CO₂Values Are Mole Fraction CO₂ in Liquid Phase

T/K	Solubility (X₁)	Equation parameters
288.15	8.21 × 10^–4	Derived from Henry’s Law Constant Equation
293.15	7.07 × 10^–4
298.15	6.15 × 10^–4	Std. dev. = ±1.1%
303.15	5.41 × 10^–4	Temp. range = 273.15–353.15
308.15	4.80 × 10^–4

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TABLE 2. Solubility of CO₂ in Water as a Function of CO₂ Partial Pressure
Values Are 1000 × Mole Fraction of CO₂ in Liquid Phase

Substance	t /°C	5 kPa	10 kPa	20 kPa	30 kPa	40 kPa	50 kPa	100 kPa
Continued on next page...
Carbon dioxide	0	0.067	0.135	0.269	0.404	0.538	0.671	1.337
Carbon dioxide	5	0.056	0.113	0.226	0.338	0.451	0.564	1.123
Carbon dioxide	10	0.048	0.096	0.191	0.287	0.382	0.477	0.950
Carbon dioxide	15	0.041	0.082	0.164	0.245	0.327	0.409	0.814
Carbon dioxide	20	0.035	0.071	0.141	0.212	0.283	0.353	0.704
Carbon dioxide	25	0.031	0.062	0.123	0.185	0.247	0.308	0.614
Carbon dioxide	30	0.027	0.054	0.109	0.163	0.218	0.271	0.541
Carbon dioxide	35	0.024	0.048	0.097	0.145	0.193	0.242	0.481
Carbon dioxide	40	0.022	0.043	0.087	0.130	0.173	0.216	0.431
Carbon dioxide	45	0.020	0.039	0.078	0.117	0.156	0.196	0.389
Carbon dioxide	50	0.018	0.036	0.071	0.107	0.142	0.178	0.354
Carbon dioxide	55	0.016	0.033	0.065	0.098	0.131	0.163	0.325
Carbon dioxide	60	0.015	0.030	0.060	0.090	0.121	0.150	0.300
Carbon dioxide	65	0.014	0.028	0.056	0.084	0.112	0.140	0.279
Carbon dioxide	70	0.013	0.026	0.052	0.079	0.105	0.131	0.261
Carbon dioxide	75	0.012	0.025	0.049	0.074	0.099	0.123	0.245
Carbon dioxide	80	0.012	0.023	0.047	0.070	0.093	0.116	0.232
Carbon dioxide	85	0.011	0.022	0.044	0.067	0.089	0.111	0.221
Carbon dioxide	90	0.011	0.021	0.042	0.064	0.085	0.106	0.211

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SOLUBILITY OF CARBON DIOXIDE IN WATER AT VARIOUS TEMPERATURES AND PRESSURES

References

TABLE 1. Solubility of CO₂ in Water at Common Temperatures and 1 atm Partial Pressure of CO₂Values Are Mole Fraction CO₂ in Liquid Phase