An adiabatic calorimeter for small samples

Autor:	J.C. van Miltenburg, G.J.K. van den Berg, A.C.G. van Genderen
Rok vydání:	2002
Předmět:	Chemistry Enthalpy of fusion Enthalpy Thermodynamics Calorimetry Condensed Matter Physics Calorimeter Calorimeter constant Physics::Chemical Physics Physical and Theoretical Chemistry Adiabatic process Instrumentation Phase diagram Eutectic system
Zdroj:	Thermochimica Acta. 383:13-19
ISSN:	0040-6031
DOI:	10.1016/s0040-6031(01)00701-8
Popis:	The construction and calibration of an adiabatic calorimeter for samples of about 0.4 g is described. The calorimeter works between 10 and 420 K, the accuracy is 0.5% for heat capacity measurements and 0.2% for latent energy effect like the enthalpy of fusion. The solid–liquid phase diagram of the system naphthalene–durene is presented. The phase diagram has been determined by three measurements, the interrupted way of measuring in adiabatic calorimetry was used to calculate the liquid composition at different enthalpy levels. The phase diagram is an example of an almost ideal eutectic system. The excess Gibbs energy of the liquid phase at 360 K was found to be in the order of 100 J mol−1 for the equimolar mixture.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2cba20339eb16ed36e69ea0e81c547f2 https://doi.org/10.1016/s0040-6031(01)00701-8 Zobrazit plný text záznamu Full Text from ScienceDirect