Carbon dioxide

Formula: CO₂
Molecular weight: 44.0095
IUPAC Standard InChI: InChI=1S/CO2/c2-1-3
IUPAC Standard InChIKey: CURLTUGMZLYLDI-UHFFFAOYSA-N
CAS Registry Number: 124-38-9
Chemical structure:
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Isotopologues:
- Carbon dioxide (¹²C¹⁶O₂)
Other names: Carbon oxide (CO2); Carbonic acid, gas; Carbonic anhydride; Dry ice; CO2; Anhydride carbonique; Carbonica; Kohlendioxyd; Kohlensaure; UN 1013; UN 1845; UN 2187; Cardice; Dricold; Drikold; Carbonic acid anhydride; Khladon 744; R 744
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Henry's Law data

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Data compiled by: Rolf Sander

Henry's Law constant (water solution)

k_H(T) = k°_H exp(d(ln(k_H))/d(1/T) ((1/T) - 1/(298.15 K)))
k°_H = Henry's law constant for solubility in water at 298.15 K (mol/(kg*bar))
d(ln(k_H))/d(1/T) = Temperature dependence constant (K)

k°_H (mol/(kg*bar))	d(ln(k_H))/d(1/T) (K)	Method	Reference	Comment
0.035	2400.	L	N/A
0.034	2600.	Q	N/A	Only the tabulated data between T = 273. K and T = 303. K from missing citation was used to derive k_H and -Δ k_H/R. Above T = 303. K the tabulated data could not be parameterized by equation (reference missing) very well. The partial pressure of water vapor (needed to convert some Henry's law constants) was calculated using the formula given by missing citation. The quantities A and α from missing citation were assumed to be identical.
0.045		Q	N/A	missing citation give several references for the Henry's law constants but don't assign them to specific species.
0.035	2300.	L	N/A
0.034	2400.	C	N/A
0.034	2400.	C	N/A
0.034	2400.	C	N/A
0.031	2400.	T	N/A
0.034	2400.	Q	N/A	missing citation refer to several references in their list of Henry's law constants but they don't assign them to specific species.
0.034		N/A	N/A
0.034		C	N/A
0.032	2400.	X	N/A
0.035	2400.	L	N/A
0.034	2400.	L	N/A
0.034	2400.	X	N/A	The value is taken from the compilation of solubilities by W. Asman (unpublished).
0.034	2700.	X	N/A	The value is taken from the compilation of solubilities by W. Asman (unpublished).
0.034	2400.	N/A	N/A

References

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No reference data available.

Notes

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Symbols used in this document:

d(ln(k_H))/d(1/T) Temperature dependence parameter for Henry's Law constant

k°_H Henry's Law constant at 298.15K
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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d(ln(k_H))/d(1/T)	Temperature dependence parameter for Henry's Law constant
k°_H	Henry's Law constant at 298.15K