ABSTRACT

The heat capacities and thermal diffusivities of n-alkanoic acid methyl esters CnH2n-1O2CH3 with n from 6 to 12 have been measured. The heat capacities have been measured in the temperature range from 303.15 K to 373.15 K; the measurements of thermal diffusivity have been carried out for a given methyl ester from 303.15 K to the temperature at which a noticeable evaporation of the ester took place. The temperature dependencies of the heat capacities and thermal diffusivities have been approximated by a third-order and a first-order polynomial, respectively. It has been shown that the dependence of the molar heat capacity on n (n = 1-14) at a temperature of 298.15 K is close to linear.

Compounds

#	Formula	Name
1	C7H14O2	methyl hexanoate
2	C8H16O2	methyl heptanoate
3	C9H18O2	methyl octanoate
4	C10H20O2	methyl nonanoate
5	C11H22O2	methyl decanoate
6	C12H24O2	methyl undecanoate
7	C13H26O2	methyl dodecanoate

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	DSC	8
POMD	1	Thermal diffusivity, m2/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Laser flash apparatus	4
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	DSC	8
POMD	2	Thermal diffusivity, m2/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Laser flash apparatus	7
POMD	3	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	DSC	8
POMD	3	Thermal diffusivity, m2/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Laser flash apparatus	9
POMD	4	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	DSC	8
POMD	4	Thermal diffusivity, m2/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Laser flash apparatus	9
POMD	5	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	DSC	8
POMD	5	Thermal diffusivity, m2/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Laser flash apparatus	11
POMD	6	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	DSC	8
POMD	6	Thermal diffusivity, m2/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Laser flash apparatus	13
POMD	7	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	DSC	8
POMD	7	Thermal diffusivity, m2/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Laser flash apparatus	13

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Heat capacities and thermal diffusivities of some n-alkanoic acid methyl esters

Bogatishcheva, Nataliya S., Faizullin, Mars Z., Nikitin, Eugene D.

ABSTRACT