ABSTRACT

The heat capacity of N,N-dimethylformamide and N,N-dimethylacetamide in both crystalline and liquid state was determined between T = (7 to 305) Kand T = (7 to 340) K, respectively, by adiabatic vacuum calorimetry, generally with an uncertainty of +-0.2%. The melting temperatures and the enthalpies of fusion were measured and the entropies of fusion were estimated. The experimental data were used to calculate the standard (p = 0.1 MPa) thermodynamic functions of the examined amides C p;m=R; DT oH m=R; DT o S m=R; and U m 1/4 DT oS m DT oH m=T (where R is the universal gas constant) in the range from T ! 0 to T = 305 (340) K.

Compounds

#	Formula	Name
1	C3H7NO	dimethylformamide
2	C4H9NO	N,N-dimethylethanamide

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	Adiabatic calorimetry	1
POMD	1	Triple point temperature, K ; Crystal			Crystal Liquid Gas	Adiabatic calorimetry	1
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vacuum adiabatic calorimetry	57
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	VADIAC:UFactor:2	25
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	VADIAC:UFactor:2	98
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vacuum adiabatic calorimetry	12
POMD	1	Molar enthalpy, kJ/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VADIAC:UFactor:2	12
POMD	1	Molar enthalpy, kJ/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	VADIAC:UFactor:2	25
POMD	1	Molar entropy, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	VADIAC:UFactor:2	25
POMD	1	Molar entropy, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VADIAC:UFactor:2	12
POMD	2	Molar enthalpy of transition or fusion, kJ/mol ; Crystal			Crystal Liquid Gas	Adiabatic calorimetry	1
POMD	2	Triple point temperature, K ; Crystal			Crystal Liquid Gas	Adiabatic calorimetry	1
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vacuum adiabatic calorimetry	67
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	VADIAC:UFactor:2	147
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	VADIAC:UFactor:2	31
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vacuum adiabatic calorimetry	11
POMD	2	Molar enthalpy, kJ/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VADIAC:UFactor:2	11
POMD	2	Molar enthalpy, kJ/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	VADIAC:UFactor:2	31
POMD	2	Molar entropy, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	VADIAC:UFactor:2	31
POMD	2	Molar entropy, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VADIAC:UFactor:2	11

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Thermodynamic properties of N,N-dimethylformamide and N,N-dimethylacetamide

Smirnova, N. N., Tsvetkova, L. Ya., Bykova, T. A., Marcus, Y.[Yizhak]

ABSTRACT