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G and S is designed to show Gibbs energy and
entropy as a function of extent of reaction. It can be used to
determine equilibrium compositions and changes in Gibbs
energy and entropy for reactions, and to invite the
exploration of differences and relationships between various
thermodynamic properties. Changes in the system, surroundings,
and universe are all available to show different ways in which
the second law of thermodynamics can be used to determine
the direction of spontaneous change and the position of
equilibrium. It permits quantitative tests of qualitative
predictions of the effect on equilibrium position following a
change in the conditions.
G and S can be used as a lecture demonstration or as
a dry lab for students to explore the interrelationship
between Gibbs energy, entropy, and equilibrium. An extensive
exercise illustrating many uses of the program is included.
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