ABSTRACT

Molar heat capacities of 1-propanol were measured from 10 K to 350 K, and Sabs,m(T) and Hm(T)-Hm(0) were calculated. The enthalpy of fusion was found to be (5400 ? 10) J?mol-1; the triple-point temperature was calculated as (148.71 ? 0.02) K. Similar measurements were made on 1-pentanol between 85 K and 370 K; the enthalpy of fusion was found to be (10510 ? 20) J?mol-1; the triple-point temperature was (195.6 ? 0.1) K. The molar heat capacity of the liquid 1-alcohols with a number of carbon atoms n in the linear chain between 3 and 22 can be described by Cp,l(n,T) = {99.38 + 17.769n + 0.05199n(T/K) - 0.8742(T/K) + 1265.2/(T/K) + 0.0022603(T/K)2} J?K-1?mol-1, with a standard deviation of 3.1 J?K-1?mol-1. The main deviations occur above 370 K, where the experimental data start to flatten. Plotting the experimental heat capacity data for the 1-alcohols with a carbon number in the chain between 3 and 22 on a mass basis showed that all curves pass through almost the same value around 290 K.

Compounds

#	Formula	Name
1	C3H8O	propan-1-ol
2	C5H12O	pentan-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	Constraint	Phase	Method	#Points
POMD	1	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Gas	ADIACA:UFactor:2	1
POMD	1	Triple point temperature, K ; Crystal			Crystal Liquid Gas	ADIACA:UFactor:2	1
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	VADIAC:UFactor:2	72
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VADIAC:UFactor:2	81
POMD	1	Molar heat capacity at saturation pressure, J/K/mol ; Glass	Temperature, K; Glass		Glass Gas	VADIAC:UFactor:2	5
POMD	1	Molar enthalpy, kJ/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	VADIAC:UFactor:2	15
POMD	1	Molar enthalpy, kJ/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VADIAC:UFactor:2	23
POMD	1	Molar entropy, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	VADIAC:UFactor:2	15
POMD	1	Molar entropy, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vacuum adiabatic calorimetry	23
POMD	2	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Gas	ADIACA:UFactor:2	1
POMD	2	Triple point temperature, K ; Crystal			Crystal Liquid Gas	ADIACA:UFactor:2	1
POMD	2	Molar heat capacity at saturation pressure, J/K/mol ; Liquid	Temperature, K; Liquid		Liquid Gas	VADIAC:UFactor:2	186
POMD	2	Molar heat capacity at saturation pressure, J/K/mol ; Crystal	Temperature, K; Crystal		Crystal Gas	VADIAC:UFactor:2	72

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

Heat Capacities and Derived Thermodynamic Functions of 1-Propanol between 10 K and 350 K and of 1-Pentanol between 85 K and 370 K

van Miltenburg, J. C., Van Den Berg, G. J. K.

ABSTRACT