Topological investigations of thermodynamic properties of binary mixtures containing 2-pyrrolidinone

Topological Investigations of Excess Molar Volumes and Excess Isentropic Compressibilities of Ternary Mixtures Containing Pyrrolidin-2-one at 308.15 K

“…Our earlier studies on 2-Py (i) + benzene or methyl benzene or propan-1-ol ( j) binary mixtures have suggested [17,18] that while 2-Py and propan-1-ol exist as an associated molecular entity, benzene and methyl benzene exist as monomers, and 2-Py (i) + benzene or methyl benzene ( j) mixture formation involves the processes: (i) establishment of i n − j unlike contact formation between i n and j molecules; (ii) unlike contact formation (i n − j) cause depolymerization of i n ; and (iii) monomers of i and j then undergo specific interactions to form i : j molecular entity. The overall change in thermodynamic properties, excess molar enthalpies H E , and excess isentropic compressibilities (X E , X = H or κ S ) due to these processes were expressed by…”

“…(X = V or κ S ) are the parameters characteristic of (i + j), ( j + k), and (i + k) binary mixtures and have been taken from the literature [17,18,29]. κ (n) S and X (n) i j (X = V or κ S ), parameters characteristic of binary and ternary mixtures, were determined by the least-squares method and are recorded along with their standard deviations, σ X E i jk (X = V or κ S ) in Tables 2 and 4, respectively.…”

“…Ab initio [15,16] and topological investigations [17,18] on pyrrolidin-2-one (i) + water or benzene or methyl benzene or p-or m-xylene or ethanol or propanol or butanol ( j) binary mixtures have revealed that 2-Py is an associated molecular entity (mixture of cyclic and open dimers), and thermodynamic properties such as excess molar volumes, excess molar enthalpies, and excess isentropic compressibilities for these binary mixtures predicted by employing graph theory compare well with their corresponding experimental values. As a part of our experimental program on thermodynamic properties of binary and ternary mixtures containing 2-Py as a common constituent, we report here excess molar volumes, V E , speeds of sound, u i jk , of 2-Py (i) + benzene or methyl benzene ( j) + propan-1-ol (k) ternary mixtures, and speeds of sound, u i j , of benzene or methyl benzene (i) + propan-1-ol ( j) binary mixtures at 308.…”

Thermodynamic Properties of Ternary Liquid Mixtures of 2-Pyrrolidinone with Aromatic Hydrocarbons

“…are adjustable parameters of (i + j), (j + k), and (i + k) binary mixtures and were taken from the literature [4,11,12]. X (n) i jk (n = 0 − 2) adjustable parameters of the (i + j + k) ternary mixtures were calculated by least-squares optimization and are recorded along with standard deviations, σ X E i jk , in Tables 2 and 3.…”

“…Thermodynamic properties of (i + j + k) ternary mixtures can be predicted from the thermodynamic properties of their (i + j), (j + k), and (i + k) sub-binary mixtures. In recent studies [4], we have reported molar excess volumes, molar excess enthalpies, and excess isentropic compressibilities of 2-pyrrolidinone (i) + benzene or toluene or o-or p-or m-xylene (j) binary mixtures. In the present paper continuing our study, we report here molar excess volumes and speeds of sound of 2-pyrrolidinone (i) + toluene (j) + o-or p-xylene (k) ternary mixtures.…”