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Dortmund Data Bank Thermophysical Data for Process Design Contact: ☎ +49 441 361819 0 or ✉ info@ddbst.com

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DDB#	Name	CAS-RN	Formula
1340	Hydrogen iodide	10034-85-2	HI	Overview

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Pure Component Data

Property	Points	Sets	Temperature Range	States	Sets
Critical Data	8	6	(hidden)	Critical Point	6
Density	40	9	4-298 K	Liquid	3
				Solid	3
				Liquid Phase of VLE	2
				Vapor Phase of VLE	1
Dielectric Constant	60	10	86-612 K	Liquid	4
				Crystal 2	2
				Crystal 1	2
				Gas/Vapor	1
				Solid	1
Entropy	1	1	298-298 K	Solid	1
Heat of Fusion	1	1	(hidden)	Solid-Liquid	1
Heat of Transition	5	5	70-126 K	Crystal 2 > Crystal 1	3
				Crystal 3 > Crystal 2	2
Heat of Vaporization	4	1	238-238 K	Vapor-Liquid	1
Ideal Gas Heat Capacity	86	2	25-6000 K	Ideal Gas	2
Melting Point	11	11	(hidden)	Solid-Liquid	11
Molar Heat Capacity (cP)	390	27	2-238 K	Solid	18
				Liquid	3
				Crystal 3	2
				Crystal 2	2
				Crystal 1	2
Std. Heat of Formation	79	1	0-6000 K	Ideal Gas	1
Surface Tension	7	1	225-237 K	Liquid	1
Transition Temperature	3	3	(hidden)	Crystal 2 > Crystal 1	2
				Crystal 3 > Crystal 2	1
Triple Point	2	1	(hidden)	Solid-Liquid-Vapor	1
Vapor Pressure	50	12	178-298 K	Vapor-Liquid	8
				Vapor-Solid	4
Viscosity (Dynamic)	20	4	223-524 K	Gas/Vapor	3
				Liquid	1
Electrical Conductivities	1	1	223-223 K	n.a.	n.a.

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