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Thermal expansivity, volume and the effect of pressure on the isobaric heat capacity of 1-hexanamine-1 hexanol mixtures from 0.1 to 400 MPa at 303 K up to 453 K

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Abstract

Thermal expansivities of liquid mixtures of 1-hexanol and 1-hexanamine have been determined as a function of pressure up to 400 MPa over the temperature range from 303 to 453 K. Measurements were performed in a pressure-scanning calorimeter by the stepwise technique. Compressibilities of the mixtures under study were determined at 303 K using the technique described before. Molar volumes under atmospheric pressure were determined for each mixture from the density measurements with a Paar instrument. From both the molar volume as a function of pressure at 303 K and the thermal expansivities the effects of pressure on the isobaric heat capacity were determined over the whole pressure and temperature range under study.

Zusammenfassung

Im Temperaturbereich 303–453 K wurde der thermische Ausdehungskoeffizient flüssiger Gemische aus 1-Hexanol und 1-Aminohexan als Funktion des Druckes bis 400 MPa bestimmt. Die Messungen wurden in einem Druck-Scanningkalorimeter nach der Schritt-für-Schritt-Methode ausgeführt. Die Kompressibilität der untersuchten Gemische wurde bei 303 K mittels der bereits beschriebenen Methode bestimmt. Mittels Dichtemessungen in einem Paar-Gerät wurde für jedes Gemisch das molare Volumen bei Atmosphärendruck ermittelt. Anhand der Druckabhängigkeit des molaren Volumens bei 303 K sowie der thermischen Ausdehnungskoeffizienten wurde der Einflu\ des Druckes auf die isobare Wärmekapazität im gesamten untersuchten Druck- und Temperaturintervall bestimmt.

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Tomaszkiewicz, I., Randzio, S.L. Thermal expansivity, volume and the effect of pressure on the isobaric heat capacity of 1-hexanamine-1 hexanol mixtures from 0.1 to 400 MPa at 303 K up to 453 K. Journal of Thermal Analysis 38, 355–360 (1992). https://doi.org/10.1007/BF01915500

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