Ammonia

Formula: H₃N
Molecular weight: 17.0305
IUPAC Standard InChI: InChI=1S/H3N/h1H3
IUPAC Standard InChIKey: QGZKDVFQNNGYKY-UHFFFAOYSA-N
CAS Registry Number: 7664-41-7
Chemical structure:
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Isotopologues:
- Ammonia-d3
Other names: Ammonia gas; Nitro-Sil; Spirit of Hartshorn; NH3; Ammonia, anhydrous; Anhydrous ammonia; Aromatic Ammonia, Vaporole
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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
27.	2100.	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.
61.	4200.	M	N/A
56.	4100.	M	N/A
56.	4200.	T	N/A
58.	4100.	T	N/A
58.	4100.	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.
78.		M	N/A
62.	4085.?	N/A	N/A
53.		Q	N/A	missing citation gives missing citation as the source for the data. However, no data was found in that reference.
59.	4400.	X	N/A
76.	3400.	M	N/A
61.	4200.	L	N/A
10.	1500.	L	N/A
57.	4100.	X	N/A	The value is taken from the compilation of solubilities by W. Asman (unpublished).
59.	4100.	X	N/A	The value is taken from the compilation of solubilities by W. Asman (unpublished).
62.		X	N/A	Value given here as quoted by missing citation.

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