ABSTRACT

The heat capacities at constant pressure of 1,2-ethanediol (1,2-EtD), 1,3-propanediol (1,3-PrD), 1,4-butanediol (1,4-BuD), 1,5-pentanediol (1,5-PeD), and 1,7-heptanediol (1,7-HpD) were measured within the temperature range from (293.15 to 353.15) K. The heat capacities of three other compounds, 1,6-hexanediol (1,6-HxD), 1,8-octanediol (1,8-OcD), and 1,9-nonanediol (1,9-NoD), were also measured between their melting point and 353.15 K. All measurements were performed by means of a DSC III (Setaram) differential scanning calorimeter. Assuming that the molar heat capacity shows an additive character, a simple equation was proposed that allows one to describe Cp values of liquid R,u-alkanediols as a function of temperature and the alkyl chain length with an accuracy below 1 %.

Compounds

#	Formula	Name
1	C2H6O2	1,2-ethanediol
2	C3H8O2	propan-1,3-diol
3	C4H10O2	1,4-butanediol
4	C5H12O2	1,5-pentanediol
5	C6H14O2	1,6-hexanediol
6	C7H16O2	1,7-heptanediol
7	C8H18O2	1,8-octanediol
8	C9H20O2	1,9-nonanediol

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	Constraint	Phase	Method	#Points
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	42
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	42
POMD	3	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	42
POMD	4	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	42
POMD	5	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	24
POMD	6	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	41
POMD	7	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	14
POMD	8	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	24

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

Heat Capacities of Some Liquid alpha,omega-Alkanediols within the Temperature Range between (293.15 and 353.15) K

Goralski, P.[Pawel], Tkaczyk, M.[Mariola]

ABSTRACT