FUNDAMENTAL THE CONDITION EQUATIONS FOR HYDROCARBONS IN CRITICAL AREA
On the basis of own and other available data on thermodynamic properties of hydrocarbons in critical area, fundamental crossover constitutive equations for methane, n-pentane, n-hexane, n-octane, cyclohexane, benzene and toluene were developed. The paper provides results of testing of equations obtained on the basis of experimental data on various thermodynamic properties. It is shown that developed fundamental constitutive equations allow to calculate all thermodynamic properties in a range of density 0,3 ≤ ρ/ρс ≤ 1,7 and temperatures 0,95 ≤ Т/Тс ≤ 1,3 with sufficient practical accuracy.