Ultrasonic study on binary mixture containing dimethylformamide and methanol over the entire miscibility range (0less thanxless than1) at temperatures 303 323K
Raj, A. M. E., Resmi, L. B., Jothy, V. B., Sanjeeviraja, C.
The experimental density and speed of ultrasound measurements in connection with literature data have been measured for pure N,N-dimethylformamide (DMF), methanol and their binary mixtures over the whole miscibility range at different temperatures 303, 308, 313, 318 and 323 K. These parameters were used to determine the adiabatic compressibility, intermolecular free length, molar compressibility, molar sound velocity, acoustic impedance, relaxation strength and their excess values. The variation of these parameters with composition of mixture indicates the nature and extent of interaction between unlike molecules. The non-ideal behavior of the systemstudiedwas explained on the basis of the dipole-induced dipole interactions and hydrogen bonding. The complex formation through intermolecular hydrogen bonding was confirmed from the recorded FTIR spectra. Available thermal energy breaks the bonds between the associated molecules into their respective monomers on increasing the temperature.
Compounds
#
Formula
Name
1
C3H7NO
dimethylformamide
2
CH4O
methanol
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
2
1
Speed of sound, m/s ; Liquid
Temperature, K; Liquid
Mole fraction - 1; Liquid
Mass density, kg/m3; Liquid
Frequency, MHz; Liquid
Liquid
Single crystal variable path ultrasonic interferometer operating at 2 MHz