Excess molar volumes, excess molar enthalpies, and excess isentropic compressibilities of tetrahydropyran with aromatic hydrocarbons

Sound Speeds and Excess Isentropic Compressibilities of Ternary Mixtures of Tetrahydropyran and Aromatic Hydrocarbons at 308.15 K

“…are the adjustable parameters of (i + j), ( j + k), and (i + k) binary mixtures and were taken from the literature [6,23]. Further, (κ (n) S ) i jk , etc.…”

“…Further, (κ E S ) i jk values for THP (i) + toluene ( j) + p-xylene (k) are smaller than those for THP (i) + toluene ( j) + o-xylene (k) ternary mixtures. This may be due to the A thermodynamic analysis [6] of excess molar volumes, V E , excess molar enthalpies, H E , and excess isentropic compressibilities, κ E S , for THP (i) + benzene or toluene or o-or p-or m-xylene ( j) binary mixtures by graph theory has revealed that that while THP (i) in a pure state exists as an associated molecular entity, i n ; benzene or toluene or o-or p-xylene exist as monomers. If toluene or o-or p-xylene (k) is added to THP (i) + benzene ( j) and o-or p-xylene (k) is added to the THP (i) + toluene ( j) binary mixture, then the ternary THP (i) + benzene ( j) + toluene or o-or p-xylene (k); and THP (i) + toluene ( j) + o-or p-xylene (k) mixture formation may be assumed to involve the following processes: (1) the establishment of (a) i n − j, (b) j − k, and (c) i n − k unlike contacts; (2) unlike contact formation between i n − j, and i n − k would then depolymerize i n to yield monomers of (i); and (3) monomers of (i), ( j), and (k) then undergo specific interactions to yield the i: j, j:k, and i:k molecular entities.…”

“…Although a large number of investigations [1][2][3][4][5] have been carried out on liquid mixtures containing tetrahydropyran or aromatic hydrocarbons as one of the components in binary or ternary mixtures, no ternary data on tetrahydropyran and two aromatic hydrocarbons are found in the literature. In recent studies [6], excess molar volumes, V E , excess molar enthalpies, H E , and excess isentropic compressibilities, κ E S , of tetrahydropyran (i) + benzene or toluene or o-or p-or m-xylene ( j) mixtures have been analyzed in terms of graph theory (which in turn depends on the connectivity parameter of third degree of a molecule). It has been observed that V E , H E , and κ E S values predicted by graph theory compare well with their corresponding experimental values.…”

“…It has been observed that V E , H E , and κ E S values predicted by graph theory compare well with their corresponding experimental values. As a continuing interest in the thermodynamic properties of ternary mixtures [6][7][8][9][10], we report here speeds of sound of tetrahydropyran (i) + benzene ( j) + toluene or o-or p-xylene (k); tetrahydropyran (i) + toluene ( j) + o-or p-xylene (k) ternary mixtures.…”

Excess Heat Capacities of Binary Mixtures Containing o-Chlorotoluene and Pyridine or Isomeric Picolines or Aromatic Hydrocarbons

“…Singh et al [43] have also shown that the value of 3 n of a molecule represents a measure of the probability that its surface area interacts effectively with the corresponding surface area of another molecule and within the same isomeric species, the molar volume of a molecule varies inversely as its 3 n. Excess molar volumes, V E , excess molar enthalpies, H E , excess isentropic compressibilities, j E S , and excess Gibbs energy, G E , of binary or ternary liquid mixtures have been successfully determined [44][45][46][47][48][49][50] by utilizing 3 n values of the constituent molecules (Graph theory).…”