34-entropy - 1 Week 14 CHEM 1310 Sections L and M 1 Ch 10...

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Unformatted text preview: 1 Week 14 CHEM 1310 - Sections L and M 1 Ch. 10: Spontaneity & Entropy Spontaneous chemical reactions occur by themselves, given time, without outside intervention. 2 C 8 H 18 (l) + 25 O 2 (g) 16 CO 2 (g) + 18 H 2 O(l) Octane fuel Why doesn’t the reverse reaction occur spontaneously? Equilibrium is far to the right for this reaction. Week 14 CHEM 1310 - Sections L and M 2 Ch. 10: Spontaneity & Entropy Spontaneous chemical reactions occur by themselves, given time, without outside intervention. Air Bromine Vapor Spontaneous Change More intuitive illustration… Week 14 CHEM 1310 - Sections L and M 3 Some chemical reactions are not spontaneous. Why? Air Bromine Vapor Mixture of Air and Bromine Vapor X Spontaneity 2 Week 14 CHEM 1310 - Sections L and M 4 How can one predict whether or not a chemical reaction will be spontaneous? THEORY: Consider 1 st Law of Thermodynamics Spontaneity Energy can neither be created nor destroyed Addresses questions such as: • How much energy is involved in a change?...
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This note was uploaded on 08/23/2011 for the course CHEM 1310 taught by Professor Staff during the Spring '11 term at University of Florida.

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34-entropy - 1 Week 14 CHEM 1310 Sections L and M 1 Ch 10...

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