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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
1064	Ethyne	74-86-2	C2H2	Overview

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Pure Component Data

Property	Points	Sets	Temperature Range	States	Sets
Critical Data	18	18	(hidden)	Critical Point	18
Density	86	12	190-309 K	Liquid Phase of VLE	4
				Liquid	4
				Vapor Phase of VLE	2
				Critical Point	1
				Gas/Vapor	1
Dielectric Constant	19	4	195-461 K	Gas/Vapor	3
				Liquid	1
Enthalpy (H-H298)	14	1	0-1500 K	Ideal Gas	1
Entropy	4	4	298-298 K	Gas/Vapor	4
G-function	77	3	100-6000 K	Gas/Vapor	3
Heat of Fusion	1	1	(hidden)	Solid-Liquid	1
Heat of Sublimation	1	1	160-160 K	Vapor-Solid	1
Heat of Vaporization	13	5	189-298 K	Vapor-Solid	3
				Vapor-Liquid	2
Ideal Gas Heat Capacity	93	4	100-6000 K	Ideal Gas	4
Melting Point	7	7	(hidden)	Solid-Liquid	7
Molar Heat Capacity (cP)	17	2	223-773 K	Gas/Vapor	1
				Liquid	1
Second Virial Coefficient	3	1	273-313 K	Gas/Vapor	1
Speed of Sound	2	1	292-292 K	Gas/Vapor	1
Std. Heat of Combustion	2	2	298-298 K	Gas/Vapor	2
Std. Heat of Formation	15	2	0-1500 K	Gas/Vapor	2
Surface Tension	17	4	190-217 K	Liquid	4
Thermal Conductivity	35	7	223-773 K	Gas/Vapor	6
				Liquid	1
Triple Point	2	2	(hidden)	Solid-Liquid-Vapor	2
Vapor Pressure	320	28	89-310 K	Vapor-Solid	16
				Vapor-Liquid	11
				Further States	1
Viscosity (Dynamic)	153	23	223-773 K	Gas/Vapor	22
				Further States	1
Octanol-Water Partition Coefficients	2	2	297 K

Pure Component Properties Data Bank Information Page

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