VAPOUR PRESSURE OF SELECTED HYDROCARBONS.

Wagner equation of a uniform structure has been used for the description of vapor pressure for CH//4, C//2H//6, C//3H//8, n-C//4H//1//0, iso-C//4H//1//0, C//2H//4 and C//3H//6 over the whole temperature range from the triple to the critical point. Coefficients for the equation have been determined from particular sets of critically evaluated experimental data and critical parameters using the least square method. Detailed comparison of calculated values with experimental data and some well known correlations are presented. Simple, uniform equation represents experimental data with reasonable accuracy and it is well applicable in databanks.