Teaching Activities and Activity Coefficients: An Alternative Approach
Teaching Activities and Activity Coefficients: An Alternative Approach
Author(s): Jamil AhmadSubject(s): Social Sciences, Economy, Education, Business Economy / Management, School education, Vocational Education, Adult Education, Higher Education , Inclusive Education / Inclusion
Published by: Национално издателство за образование и наука „Аз-буки“
Keywords: activity; activity coefficient; equilibrium constant; Raoult’s law, Henry’s law; chemical potential
Summary/Abstract: The article outlines an approach to teaching the concept of activity and activity coefficient starting with the relationship between Gibbs free energy change and pressures of ideal gases for the process of their mixing. The gases are then assumed to be the vapor in equilibrium with a liquid solution, allowing concentrations in the solution to be related to the vapor pressures through Raoult’s or Henry’s laws, appropriately modified to account for any deviation from these laws. Chemical potentials of individual components of the liquid solution are then related to activities, and the expression for the equilibrium constant in terms of activities is developed.
Journal: Химия. Природните науки в образованието
- Issue Year: 28/2019
- Issue No: 3
- Page Range: 308-313
- Page Count: 6
- Language: English
- Content File-PDF