Spontaneity, Entropy, and Free Energy

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Spontaneity, Entropy, and Free Energy Chapter 16 Spontaneity, Entropy, and Free Energy

Figure 16.1: When methane and oxygen react to form carbon dioxide and water, the products have lower potential energy than the reactants. This change in potential energy results in energy flow (heat) to the surroundings. Copyright © Houghton Mifflin Company. All rights reserved.

Figure 16.2: The rate of a reaction depends on the pathway from reactants to products; this is the domain of kinetics. Thermodynamics tells us whether a reaction is spontaneous based only on the properties of the reactants and products. The predictions of thermodynamics do not require knowledge of the pathway between reactants and products.

Figure 16.3: The expansion of an ideal gas into an evacuated bulb. Copyright © Houghton Mifflin Company. All rights reserved.

Figure 16.4: Possible arrangements (states) of four molecules in a two-bulbed flask.

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The hypothetical contraction of a gas.

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