ERIC Number: EJ1031139
Record Type: Journal
Publication Date: 2014-Mar
Abstractor: As Provided
Reference Count: N/A
A Simple Method to Calculate the Temperature Dependence of the Gibbs Energy and Chemical Equilibrium Constants
Vargas, Francisco M.
Journal of Chemical Education, v91 n3 p396-401 Mar 2014
The temperature dependence of the Gibbs energy and important quantities such as Henry's law constants, activity coefficients, and chemical equilibrium constants is usually calculated by using the Gibbs-Helmholtz equation. Although, this is a well-known approach and traditionally covered as part of any physical chemistry course, the required mathematical treatment for solving the equation can be tedious and prone to mistakes especially when polynomial expressions for the heat capacities are used. In this article, an alternative approach is introduced in which a simple algebraic equation can provide quick and accurate results for the temperature dependence of the Gibbs energy and chemical equilibrium constants. The comparison against the conventional methods and values reported in the literature validate the effectiveness of the proposed equation.
Descriptors: Computation, Climate, Energy, Chemistry, Scientific Concepts, Physics, Equations (Mathematics), Algebra, Comparative Analysis, Thermodynamics, College Science, Science Instruction
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: firstname.lastname@example.org; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Authoring Institution: N/A