Densities, Molar Volumes, Thermal Expansion Coefficients, and Isothermal Compressibilities of Organic Acids from 293.15 K to 323.15 K and at Pressures up to 25 MPa

Abstract

Densities of seven straight-chain organic acids, including acetic acid, propanoic acid, butanoic acid, pentanoic acid, hexanoic acid, heptanoic acid, and octanoic acid, have been measured by using a vibrating-tube densimeter in the temperature range from 293.15 K to 323.15 K and pressure range from 0.1 MPa to 25.0 MPa. Molar volumes of these organic acids have been obtained from the measured densities and fitted to polynomials as a function of temperature and pressure. Thermal expansion coefficients and isothermal compressibilities have been derived as a function of temperature and pressure.