Comparison of modified Redlich-Kwong equations of state in evaluating compression factors of real gases

Authors

Michelle S. Bincolado ⋅ PH Institute of Chemistry, University of the Philippines Los Baños
Ma. Irina S. Sagarbarria ⋅ PH Institute of Chemistry, University of the Philippines Los Baños
Jan Jerald T. Mangaldan ⋅ PH Institute of Chemistry, University of the Philippines Los Baños
Ernesto J. del Rosario ⋅ PH Institute of Chemistry, University of the Philippines Los Baños
Meredith Anne C. Sotto ⋅ PH Institute of Mathematical Sciences and Physics, University of the Philippines Los Baños

Abstract

Two modifications of the Redlich-Kwong equation of state (EOS) were compared against the original EOS based on their ability to accurately predict the compression factors of argon and carbon dioxide. For the first modification, the exponent of T was changed from 1/2 to 1; and for the second modification, the exponent of T was changed to 3/2. For argon, the Redlich-Kwong modification 1 gave the lowest maximum deviation (8.68 x 10^–1%) at the low P, high T quadrant while the original Redlich-Kwong equation gave the highest maximum deviation (4.702 x 10³%) at the low P, low T quadrant. For carbon dioxide, the Redlich-Kwong modification 1 gave the lowest maximum deviation (7.72 x 10^–2%) at the low P, low T quadrant while the Redlich-Kwong 3/2 modification gave the highest maximum deviation (26%) at the high P, high T quadrant. The computations were facilitated with the use of Mathematica 5.1 software (Wolfram 2003).

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Issue

2006: Proceedings of the 24th Samahang Pisika ng Pilipinas National Physics Congress

Article ID

SPP-2006-PA-38

Section

Poster Session PA

Published

2006-10-25

How to Cite

[1]

MS Bincolado, MIS Sagarbarria, JJT Mangaldan, EJ del Rosario, and MAC Sotto, Comparison of modified Redlich-Kwong equations of state in evaluating compression factors of real gases, Proceedings of the Samahang Pisika ng Pilipinas 24, SPP-2006-PA-38 (2006). URL: https://proceedings.spp-online.org/article/view/SPP-2006-PA-38.