Condensed Matter Physics, 2020, vol. 23, No. 3, 34601
DOI:10.5488/CMP.23.34601           arXiv:2010.00442

Title: On the apparent molar volume of methanol in water-methanol mixtures. Composition and temperature effects from molecular dynamics study
Author(s):
  M. Cruz Sanchez (Instituto de Quimica, Universidad Nacional Autonoma de Mexico, Circuito Exterior, 04510, Cd. de Mexico, Mexico),
  M. Aguilar (Instituto de Quimica, Universidad Nacional Autonoma de Mexico, Circuito Exterior, 04510, Cd. de Mexico, Mexico),
  O. Pizio (Instituto de Quimica, Universidad Nacional Autonoma de Mexico, Circuito Exterior, 04510, Cd. de Mexico, Mexico)

We explore the effects of composition and temperature on the apparent molar volumes of species of water-methanol mixtures. Isothermal-isobaric molecular dynamics simulations are used with this purpose. Several combinations of models for water and for methanol are explored. Validity of predictions concerned with a puzzling minimum of apparent molar volume of methanol in water-rich solutions is tested against experimental results.

Key words: water-methanol mixtures, excess mixing volume, apparent molar volume, molecular dynamics simulations


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