Densities and thermal expansions of (water + tetrahydrofuran) mixtures within the temperature range from (274.15 to 333.15) K at atmospheric pressure

Abstract

The mixture {water (1) + tetrahydrofuran (2)} densities have been measured over the whole composition range at temperatures between (274.15 and 333.15 K) and atmospheric pressure using the vibration type densimeter. Values of excess molar volume and molar isobaric thermal expansion of the mixture as well as apparent/partial molar volumes (down at infinite dilution) for water and tetrahydrofuran (THF) have been calculated. It is shown that the formation of the water + THF mixture occurs with decreasing its volume under all the temperatures. Concentration dependences of partial molar volumes of water and THF are characterized by the presence of extreme regions. Standard (limiting) partial molar volumes of water and THF increase as the temperature is rising. Increase in both temperature and THF content influence on the value of molar isobaric expansion of the mixture in the same way.