Journal
JOURNAL OF CHEMICAL THERMODYNAMICS
Volume 41, Issue 1, Pages 35-45Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jct.2008.08.003
Keywords
Density; Speed of sound; Isobaric heat capacities; Isentropic compressibility; Thermal expansivity; N-methyl-2-pyrrolidinone; Methanol
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Funding
- Ministerio de Ciencia y Tecnologia, Spain [PPQ2002-02150]
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We report measurements of the speed of sound in mixtures of N-methyl-2-pyrrolidinone and methanol at temperatures between 298.15 K and 343.15 K and at pressures up to 60 MPa. The measurements were made using a dual path pulse-echo apparatus operating at a frequency of 5 MHz. We have also measured the isobaric specific heat capacity of each mixture as a function of temperature at ambient pressure, by means of a Setaram DSC III microcalorimeter. The experimental results have been combined with literature data for the density of the same Mixtures as a functions of temperature at ambient pressure to obtain the density, isobaric specific heat capacity, and other thermodynamic properties at temperatures between 298.15 K and 343.15 K and at pressures up to 60 MPa. Detailed comparisons with the literature data are presented. (C) 2008 Elsevier Ltd. All rights reserved,
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