Thermodynamic Properties for Argon

Journal of Physical Chemistry & Eleectrochemistry

مقاله 5، دوره 2، شماره 2، خرداد و تیر 2014، صفحه 139-143   

نوع مقاله: Research Paper

تاریخ دریافت: 20 مهر 1392،  تاریخ پذیرش: 20 مهر 1392 

چکیده

An analytical equation of state is applied to calculate the thermodynamic properties for argon. The
equation of state is that of Song and Mason. It is based on a statistical-mechanical perturbation theory of
hard convex bodies and can be written as fifth-order polynomial in the density. There exist three temperaturedependent
parameters: the second virial coefficient, an effective molecular volume, and a scaling factor
for the average contact pair distribution function of hard convex bodies. We used Lennard-Jones (12-6)
potential for calculation temperature-dependent parameters. The equation of state has been applied to
calculate thermodynamic properties including the internal energy, the enthalpy, the entropy, the heat capacity
at constant pressure, and the speed of sound for argon. The theoretical results are in good agreement with
the experimental data.

کلیدواژه‌ها

Thermodynamic؛ Argon