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abeka phy sci 9 section 15.2
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study this with 15.1 for the quiz tmr
Physical Science
9th
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chemical thermodynamics
study of relationship between chemical reactions and the laws of thermodynamics
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first law of thermodynamics
relates energy gained by a system to the energy lost by its surroundings
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exothermic
energy is released
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endothermic
energy is absorbed
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second law of thermodynamics
every chemical reaction causes a decrease in usable energy and an increase in entropy
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spontaneous
reaction that occurs without continuing outside help
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chemical kinetics
deals with rates of chemical reactions
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activation energy
kinetic energy that’s necessary for molecules to react
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catalyst
alters the rate of a chemical reaction without being permanently changed by the reaction
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reversible
reaction that proceeds either direction
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chemical equilibrium
two reactions in opposite directions occur at the same rate with no change
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le chatelier’s principle
system at equilibrium is disturbed, the system will react to partially offset the disturbance
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