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2. Experimental determination of thermodynamic quantities for vapor phases
Thermodynamics is concerned only with the macroscopic states of matter whose properties can be perceived experimentally. Vapors are defined as the form in which the gaseous phase of a compound appears at temperatures below a so-called "critical" temperature. Above this temperature, the properties of the liquid are similar to those of the gaseous phase. In particular, the refractive index can no longer be used to separate the liquid from the gas, so there is no longer any notion of gas but of fluid. The gas phase is thermodynamically characterized by its chemical constituents (atoms and/or molecules), its pressure and its absolute temperature (in K).
2.1 Chemical constituents of a gas
By far the most widely used technique for identifying the chemical constituents...
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Experimental determination of thermodynamic quantities for vapor phases
Bibliography
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FactSage – Developer: CRCT, École Polytechnique de Montréal (University of Montreal) Dept. of Chemical Engineering Box 6079, Station Downtown Montreal, Quebec H3C 3A7, ([email protected]) Canada and GTT-Technologies Kaiserstrasse 100 52134 Herzogenrath ([email protected]) Germany.
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Websites
IUPAC. – International Union of Pure and Applied Chemistry : http://iupac.org/
JANAF. – NIST-JANAF Thermochemical Tables : http://kinetics.nist.gov/janaf/
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