Lecture 14 - Oct 3, 2011 Chapter 5 Thermochemistry The...

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Chapter 5 Thermochemistry Energy is conserved: Law of Conservation of Energy states that energy can be converted from one form to another but can be neither created nor destroyed. The Nature of Energy
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Definitions Thermochemistry -the s tudy o f how energy in the form of heat is consumed and produced by chemical reactions. ± Energy is the capacity to do work or to transfer heat. ± Work is done when a force moves an object through a distance. H 2 (g) + O 2 (g) Æ H 2 O(l) + heat Definitions, continued Heat is energy that moves between objects because of a difference in their temperatures. ± At equilibrium, the objects will have the same temperature Heat transfer is the process of heat energy flowing from one object into another.
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Work and Energy Potential: ± due to position or composition ± Stored energy; can be converted to work ± Gravity PE = m x g x h (m = mass, g = force
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Lecture 14 - Oct 3, 2011 Chapter 5 Thermochemistry The...

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