Journal article

Teaching activities and activity coefficients: An alternative approach.

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Publication Details

Author list: J. Ahmad

Publication year: 2019

Volume number: 28

Issue number: 3

Start page: 303

End page: 313

Number of pages: 11

ISSN: 0861-9255

eISSN: 1313-8235

URL: http://khimiya.org/show_issue.php?y=2019&vol=28&issue=3&i_id=79#308(external)

Languages: English



The article outlines an approach to teaching the concept of activity and activity coefficients 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.


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Last updated on 2022-29-11 at 11:35