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Science Ch 12 TTK
Science Ch 12 TTK Review
Term | Definition |
---|---|
catalyst | a substance that increases reaction rate by lowering the activation energy of a reaction |
coefficient | a number placed in front of an element symbol or chemical formula in an equation |
combustion | a chemical reaction in which a substance combines with oxygen and releases energy |
inhibitor | a substance that slows, or even stops, a chemical reaction |
reactant | a starting substance in a chemical reaction |
products | a substance produced by a chemical reaction |
law of conservation of mass | law that states that the total mass of the reactants before a chemical reaction is the same as the total mass of the products after the chemical reaction |
exothermic | a chemical reaction that releases thermal energy |
endothermic | a chemical reaction that absorbs thermal energy |
activation energy | the minimum amount of energy needed to start a chemical reaction |