Acoustic properties and volumetric data of liquid mixtures containing valeronitrile and esteres; effects due to temperature changes

A. CAMACHO; S. CANZONIERI; D. G. SALGADO; A. MARIANO; L. ROMANÍ

Revista Boliviana de Química

Bimonthly Edition

Lugar: La Paz; Año: 2016 vol. 33 p. 50 - 61

0250-5460

In  this  work  experimental  data  of  density,  ρ,  and  velocity  of  sound,  u,  of  the  binary  systems  of  valeronitrile  and methyl  propanoate,  and  valeronitrile  and  ethyl  propanoate,  at  atmospheric  pressure  and  in  a  range  of  temperature from  278.15  K  to  318.15  K  were  reported.  From  experimental  information,  molar  volume,  V(x,  T),  excess  molar volume, V E (x, T), thermal expansion coefficient, α(x, T), thermal expansion coefficient of excess, αE (x, T), velocity of sound deviation, Δu(x, T), isentropic compressibility, κS (x, T) and isentropic compressibility of excess, κSE (x, T), were  calculated.  Each  set  of  excess  results  was  fitted  to  a  polynomial  equation  like  Redlich  and  Kister  [1]  as  a function  of  composition  and  temperature,  with  deviations  within  the  range  of  experimental  error.  Binary  mixtures studied showed negative values of αE , Δu y κSE , over the whole composition and temperature range. Also, velocity of sound was predicted with the models proposed by Nomoto [2,3], Van Dael [4] and Ernst et al. [5].