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Chemical Reactions (Vocabulary (Catalyst (a substance that increases the…
Chemical Reactions
Vocabulary
Catalyst
a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
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Inhibitor
a substance which slows down or prevents a particular chemical reaction or other process or which reduces the activity of a particular reactant, catalyst, or enzyme.
Collision Theory
When suitable particles of the reactant hit each other, only a certain fraction of the collisions cause any noticeable or significant chemical change; these successful changes are called successful collisions
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Two types of Reactions
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Exothermic Reaction
If forming new bonds releases more energy than it takes to break the old bonds, the reaction is exothermic.
Once started, exothermic reactions tend to keep going as each reaction releases more energy to fuel neighboring molecules.
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Chemical reactions where heat Is transferred to the surroundings. Indicated by a rise. in temperature
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Endothermic Reaction
If forming new bonds in the products releases less energy than it took to break the original bonds, the reaction is endothermic.
Chemical reactions where heat Is transferred from the surroundings Indicated by a fall in temperature
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