ABSTRACT

The speed of sound in hexane and heptane (mass purity greater than 0.990, GC) was measured using the Brillouin light scattering method at T = (300.15 to 506.15) K for hexane, (302.15 to 536.15) K for heptane), and p = (1.0 to 8.5) MPa, including saturated liquid, saturated vapor, and compressed liquid. The expanded relative uncertainty (k = 2) of the speed of sound was estimated to be less than 1.0% over the whole investigated range of states. Polynomial representations for the speed of sound in hexane and heptane were fitted to the experimental results. A comparison of the speed of sound data with the correlation shows that, for hexane, the AAD is 0.67% for the saturated liquid, 0.36% for the saturated vapor and 0.57% for the compressed liquid respectively, and for heptane, the AAD is 0.46% for the saturated liquid, 0.38% for the saturated vapor and 0.41% for the compressed liquid, respectively.

Compounds

#	Formula	Name
1	C7H8	toluene
2	C6H14	hexane
3	C7H16	heptane

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Phase	Method	#Points
POMD	1	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Liquid Gas	Brillouin scattering	3
POMD	2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Liquid Gas	Brillouin scattering	27
POMD	2	Speed of sound, m/s ; Gas	Temperature, K; Gas	Gas Liquid	Brillouin scattering	20
POMD	2	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid	Liquid Gas	Closed cell (Static) method	47
POMD	2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Brillouin scattering	132
POMD	3	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Liquid Gas	Brillouin scattering	30
POMD	3	Speed of sound, m/s ; Gas	Temperature, K; Gas	Gas Liquid	Brillouin scattering	23
POMD	3	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid	Liquid Gas	Closed cell (Static) method	53
POMD	3	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Brillouin scattering	136

Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Measurement of the Speed of Sound in Hexane and Heptane at Temperatures from (303.15 to 536.15) K and Pressures from (1.0 to 8.5) MPa

Zheng, X.[Xiong], Zhang, Y.[Ying], He, M.[Maogang]

ABSTRACT