Resumen

LLADO, Marta L.  y  JUBERT, Alicia H.. Useful work and its relationship with Gibbs energy. Educ. quím [online]. 2011, vol.22, n.3, pp.271-276. ISSN 0187-893X.

A class activity for General Chemistry students is proposed. In this class the equation relating Gibbs energy with useful work in reversible processes is verified. For this purpose, literature thermochemical data and values of the electromotive force (EMF) of redox reactions are employed. The EMF values can be obtained either from experimental measurements of several galvanic cells, or alternatively by the use of computer simulations which can be found in the internet. We expect this activity will help students to better understand the meaning of useful work and to connect different topics developed within the General Chemistry course.

Palabras llave : thermodynamics; electrochemistry; useful work; electromotive force.

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