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Excess Molar Volumes of Heptan-1-ol + Pentane, + Hexane, + Heptane, + Octane, and + 2,2,4-Trimethylpentane at T = 293.15 K

1997; American Chemical Society; Volume: 42; Issue: 6 Linguagem: Inglês

10.1021/je970095t

1520-5134

Jagan Nath, Jai Gopal Pandey,

Diffusion Coefficients in Liquids

Excess molar volumes, have been measured using a dilatometric technique for binary mixtures of heptan-1-ol (n-C7H15OH) + pentane (n-C5H12), + hexane (n-C6H14), + heptane (n-C7H16), + octane (n-C8H18), and + 2,2,4-trimethylpentane (2,2,4-TMP) at T = 293.15 K. has been found to be negative throughout the entire range of composition for (x)n-C7H15OH + (1 − x)n-C5H12, + (1 − x)n-C6H14, and + (1 − x)2,2,4-TMP. has been found to be positive at lower mole fractions of n-C7H15OH and negative at higher mole fractions of n-C7H15OH for (x)n-C7H15OH + (1 − x)n-C7H16 and (x)n-C7H15OH + (1 − x)n-C8H18 with an inversion of sign from positive to negative values of occurring at x ∼ 0.18 and x ∼ 0.43, respectively, for these mixtures. has been fitted in a smoothing equation.