ABSTRACT

Heat capacities at constant pressure of five alpha,omega-dichloroalkanes (1,2-dichloroethane, 1,3-dichloropropane, 1,4-dichlorobutane, 1,5-dichloropentane, 1,6-dichlorohexane) were measured at temperatures ranging from 284 K to 353 K by using a highly sensitive Tian-Calvet differential scanning microcalorimeter (DSC). Changes in the standard procedures increased the accuracy of Cp measurements. The influence of the evaporation heat effect on the Cp value is analyzed. In the described method, the uncertainty of the measurements is estimated to be 10.15% for uncertainties arising solely from the measurement system and method. The group contributions to Cp for CH2 and Cl and their temperature dependence were determined by a group additivity analysis.

Compounds

#	Formula	Name
1	C2H4Cl2	1,2-dichloroethane
2	C3H6Cl2	1,3-dichloropropane
3	C5H10Cl2	1,5-dichloropentane
4	C6H12Cl2	1,6-dichlorohexane
5	C4H8Cl2	1,4-dichlorobutane
6	H2O	water
7	C7H8	toluene
8	C4H10O	butan-1-ol

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	Molar heat capacity at saturation pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	LDSC:UFactor:0.5	30
POMD	2	Molar heat capacity at saturation pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	LDSC:UFactor:0.5	30
POMD	3	Molar heat capacity at saturation pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	LDSC:UFactor:0.5	30
POMD	4	Molar heat capacity at saturation pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	LDSC:UFactor:0.5	30
POMD	5	Molar heat capacity at saturation pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	LDSC:UFactor:0.5	30
POMD	6	Molar heat capacity at saturation pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	LDSC:UFactor:0.5	7
POMD	7	Molar heat capacity at saturation pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	LDSC:UFactor:0.5	7
POMD	8	Molar heat capacity at saturation pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	LDSC:UFactor:0.5	5

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

Heat Capacities of alpha,omega-Dichloroalkanes at Temperatures from 284.15 K to 353.15 K and a Group Additivity Analysis

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

ABSTRACT