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Unformatted text preview: Lecture 005 Energy & Thermodynamics Energy: comes in many forms, defined as the capacity to do work. Isolated system is a system which doesnt allow matter and energy to exchange between itself and its surroundings. A closed system doesnt allow matter, but allows energy to exchange between itself and its surroundings. An open system allows both matter and energy to exchange between itself and its surroundings. First law of thermodynamics: energy can neither be created nor destroyed, but can be converted to different forms. Second law of thermodynamics: energy transfer is never 100% efficient. Increase in disorder or randomness is defined as entropy. Heat is an indicator of entropy. Entropy of a system plus its surroundings must always increase. Reactions are defined as spontaneous (not requiring energy to go) if: 1. Products have lower potential energy than the reactants....
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This note was uploaded on 04/04/2009 for the course BIOLOGY 1222 taught by Professor Haffie during the Spring '09 term at UWO.
- Spring '09