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Cards In This Set
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What two things happen when a chemical reaction occurs?
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1) A new substance. made out of a different kind of particle, will form
2) There will be a change in energy from start to finish
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What is the law of conservation of matter?
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In a chemical rxn., matter is neither created nor destroyed
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The amount of time it takes for reactants to turn into products
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Reaction Rate
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A field of science that studdies the variables that affect reaction rates
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Kinetics
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What are the four variables that affect how quickly a reaction occurs?
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Concentration, Surface Area, Temperature, and Catalyst
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What is collision theory?
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The theory that the rate of rxn. is affected by four factors
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What is concentration?
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The measure of the amount of substance in a given unit volume
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What happens as concentration increases?
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The particles of the reactants availible for collision increases therfore faster rate of rxn.
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What happens as the surface area exposed increases?
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The more collisons of rxn. particles therefore higher rate of reactants
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What happens as the temperature increases?
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Particle movemant speeds up therefore increasing colliding frequency
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What is a catalyst?
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A substance that increases the chemical rxn. without being changed by the reaction
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What does a catalyst do?
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It decreases the activation energy needed and allows more rxn. particles to form products
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What is A+B---> an example of?
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Synthesis
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What is AB----->A+B an example of?
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Decomposition
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What are chemical rxns. classified by?
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Exothermic and Endothermic
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