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- W2017173660 abstract "The molar heat capacity at constant pressure Cp, for the three binary liquid mixtures carbon tetrachloride + benzene, carbon tetrachloride + cyclohexane, and benzene + cyclohexane was determined at 298.15 K from measurements of the volumetric heat capacity Cp/V in a Picker flow microcalorimeter (V is the molar volume). For the molar excess heat capacity CpE, the precision of the adopted stepwise procedure is characterized by a standard deviation of ±0.03 JK-1mol-1 or smaller (which is less than 2% of the maximal ∣CPE∣ ). The use of these three systems as test mixtures for measurements of CPE, “of binary nonelectrolyte systems is recommended. -Auxiliary data from the literature on ultrasonic velocities, molar volumes and thermal expansivities were used to calculate the molar heat capacity at constant volume Cv, and the isothermal compressibility βT of the pure substances, as well as the corresponding excess quantities CvE and (VβT)E of the binary systems. A discussion of our results in terms of external rotational behavior of the molecules is presented. Mit Hilfe eines Strömungskalorimeters nach Picker wurden die molaren Wärmekapazitäten bei konstantem Druck CP der drei binären Systeme Tetrachlorkohlenstoff + Cyclohexan, Tetrachlorkohlenstoff + Benzol, und Benzol + Cyclohexan durch Messung der volumetrischen Wärmekapazität bestimmt (bei 298,15 K). Die Präzision der Messungen (stufenweises Verfahren) ist durch Standardabweichungen von maximal ±0.03 JK-1 mol-1 charakterisiert, das ist weniger als 2% des Maximalwertes von ∣CPE. Die Verwendung dieser Systeme als Testsysteme für CPE-Messungen an binären Nichtelektrolytmischungen wird empfohlen. - Unter Zuhilfenahme von Literaturdaten für Schallgeschwindigkeiten, Molvolumina und Ausdehnungskoeffizienten wurden die molare Wärmekapazität bei konstantem Volumen Cv und die isotherme Kompressibilität βT der Reinstoffe berechnet, sowie die entsprechenden Zusatzgrößen CvE und (VβT)E der binären Systeme. Die Diskussion erfolgt mit Hinblick auf das Rotationsverhalten der Gesamtmoleküle." @default.
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- W2017173660 date "1978-12-01" @default.
- W2017173660 modified "2023-09-25" @default.
- W2017173660 title "Molar Heat Capacity and Isothermal Compressibility of Binary Liquid Mixtures: Carbon Tetrachloride + Benzene, Carbon Tetrachloride + Cylohexane and Benzene + Cylohexane" @default.
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- W2017173660 doi "https://doi.org/10.1002/bbpc.19780821204" @default.
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