Resumo

CANZONIERI, S et al. Effect of temperature on acoustic and volumetric properties of liquid binary mixtures of propanenitrile and butyl acetate, and of liquid binary mixtures of propanenitrile and pentyl acetate. Rev. Bol. Quim [online]. 2018, vol.35, n.3, pp.85-97. ISSN 0250-5460.

Abstract In this paper we present density (p) experimental data and sound velocity (u), for the binary systems: propanenitrile + butyl acétate and propanenitrile + pentyl acétate at atmospheric pressure and in a temperature range of 278, 15 K to 318.15 K every 5 K. The molar volumes, V(x, T), excess molar volumes, V_E(x, T), isobaric thermal expansión coefficient, α(x, T), excess isobaric thermal expansión coefficient, αE(x, T), the speeds of sound deviations, Δu(x, T), isentropic compressibility, k_S(x, T), and excess isentropic compressibility, k_S^E(x, T), were determined from experimental information. Every set of results of properties of the excess was fitted to a polynomial equation like the Redlich-Kister equation [1], dependent on molar fraction and temperature, giving place to diversions of the size of the experimental mistake. The studied binary mixture showed negative values of αE, Δu y kSE, in the whole range of composition and at all temperatures. The prediction of the speed of sound was calculated with the models proposed by Nomoto [2,3], Van Deal [4] and Ernst et al [5].

Palavras-chave : Excess molar volume; Speed of sound deviation; Isobaric thermal expansión coefficient; Excess isentropic compressibility; Models for the speed of sound; Propanenitrile; Butyl acétate; Pentyl acétate.

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