Vapor-Pressure Measurements of Liquid Solutions at Different Temperatures: Apparatus for Use over an Extended Temperature Range and Some New Data

An apparatus for the measurement of vapor pressures of pure solvents and solutions at different temperatures is described. The apparatus is tested for the temperature range (298.15 to 363.15) K using pure water and aqueous NaCl solutions. The vapor pressures are presented for methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, and 2-butanol, ranging from temperatures 298.15 K up to the boiling points of these alcohols. The vapor-pressure data of pure alcohols are correlated with the Antoine equation. The results are compared with literature values.