Excess molar volumes, and excess molar enthalpies of (N-methyl-2-pyrrolidinone plus an ether) at the temperature 298.15 K

Excess molar volumes V-m(E) have been calculated from measured density values over the whole composition range at T = 298.15 K and atmospheric pressure for six {N-methyl-2-pyrrolidinone + 1,1-dimethylethyl methyl ether, or dipropyl ether, or 1,1-dimethylpropyl methyl ether, or diisopropyl ether, or dibutyl ether, or dipentyl ether}. Excess molar enthalpies H-m(E) were also measured for five {N-methyl-2-pyrrolidinone + 1,1-dimethylethyl methyl ether, or dipropyl ether, or 1,1-dimethylpropyl methyl ether, or diisopropyl ether, or dibutyl ether} at T = 298.15 K and atmospheric pressure. The results are discussed in terms of intermolecular associations. The experimental results have been correlated with the UNIQUAC and NRTL equations. (C) 2002 Elsevier Science Ltd. All rights reserved.