Abstract
The density and speed of sound were measured for p-Methoxy benzoic acid (P-MBA) with Aniline, N-Methylaniline (NMA) and N, N-dimethylaniline (NNDMA) from (303.15 K–313.15 K) with 5K interval temperatures using standard techniques. Thermo physical properties of molar volume (Vm), acoustic impedance (Z), isentropic compressibility (κs), surface tension (σ) and free length (Lf) and their excess properties were intended from measured data. These excess parameters have been fitted to the Redlich–Kister type polynomial equation using the least square method. Obtained values of partial molar volumes (v¯m,1,v¯m,2) reflects the culminations were drawn from VmE. Supplementary, to test the pertinent of different theoretical models of speed of sound by means of resoluted values. Finally, the formation of hydrogen bonding between molecules in composition was fetched from FTIR spectra.
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