Prediction of Internal Pressure of Binary Liquid Mixtures Using Flory's Statistical Theory

Abstract

Internal pressures of a number of binary liquid mixtures of varying natures of component liquids have been predicted using Flory's statistical theory. The predicted values have been compared with the experimentally calculated ones. Good approximation has been observed.

Study of Internal Pressure and Related Parameters in Ternary Liquid Mixtures Using Ultrasonic Velocity Measurement

“…Internal pressure has been a subject of active interest among several researchers during recent past [7][8][9][10]. Several attempts have been made by a number of investigators [11][12][13][14][15] to calculate the internal pressure of liquids and liquid mixtures theoretically.…”

Comments on ‘Prediction of internal pressure of binary liquid mixtures using Flory's statistical theory’

“…π int(exp) = α P(exp) .T/κ T(exp) (1) α P(exp) = (0.0191κ T(exp) ) 1/4 (2) κ T(exp) = 1.71 × 10 −4 /(T 4/9 u 2 ρ 4/3 )…”

“…In their report on the 'Prediction of internal pressure of binary liquid mixtures using Flory's statistical theory', Ali and Tariq 1 calculated the so-called experimental internal pressure (π int(exp) ) of liquid mixtures using so-called experimentallyevaluated thermal expansivity (α P(exp) ) and isothermal compressibility (β T(exp) or κ T(exp) ) for 13 binary liquid mixtures involving a variety of components. These properties, at one atmospheric pressure, were calculated by use of the following relationships: π int(exp) = α P(exp) .T/κ T(exp) (1) α P(exp) = (0.0191κ T(exp) ) 1/4 (2)…”

“…The results were reported in Tables 1 and 2 of ref. 1. Discussion is based on the basis of comparison of empirical internal pressure (π int,emp ), with those computed from the Flory theory (π int,Flory ), reported in terms of average percentage deviations (APD).…”

“…Out of 13 liquid mixtures considered in paper [1], analysis on 11 of them is presented here. The required densities or excess molar volumes at different temperatures, and speeds of sound and isochoric heat capacities (C P ) or their excess values (C E P ) were taken from the work of the present authors 9,12,27-29 and from the literature.…”