Abstract
A modified perturbed hard-sphere-chain equation of state has been employed to calculate the PVT properties of fluids. Generally, two temperature-dependent parameters; an effective van der Waals covolume and the strength of the attractive forces between two nonbonded segments, and a third parameter representing the number of chains per molecule appear in the existing perturbed hard-sphere-chain equations of state. Knowing two scale parameters; depth of minimum in pair potential and the separation distance between segment centers at this minimum, are sufficient to calculate the temperature-dependent parameters. These scale parameters are obtainable by fitting of experimental data. In this work it is shown that using the critical constants of fluids as scale constants would correlate the temperature-dependent parameters of the equation of state with sufficient accuracy. We have tested the predicted equation of state against the experimental data for a large number of fluids including a number of diatomics, polyatomic inorganic molecules, saturated hydrocarbons up to n-C 20H 42, and a number of olefins and aromatics. The agreement with experiment is quite good.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.