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Chemistry Part 2

vocabulary list

Activation Energy What is needed to start a chemical reaction
Arrow you read the arrow as "yields"
Characteristics of a chemical reaction changes in energy or changes in properties
Chemical changes alter the chemical properties of matter; new substances with new properties are formed
Chemical equations a shorter easier way to show chemical reactions by using symbols instead of words
Coefficient a number placed in front of a chemical formula in an equation.
Conservation of mass the amount of matter involved in a chemical reaction
concentration amount of one material in a given amount of another material
temperature higher heat causes faster reactions
surface area increased surface area = increased reaction
cataysts materials that increase the rate of reaction
Enzymes biological catalysts
inhibitors biological catalysts
inhibitors decreases the rate of reaction
Decomposition Reaction a compound breaks down into simpler substances
endothermic reaction a reaction that takes away heat
exothermic reaction a reaction that releases heat
physical changes alter only the physical properties of matter; no new substances are formed. (size, shape, color, etc.)
precipitate a solid that forms from solution during a chemical reaction
products the materials you have after a chemical reaction; written on the right side of the formula
reactants the materials you have at the beginning of the chemical reaction; written on the left side of the formula
replacement reaction one part of a compound is displaced by an element or compound from another substance
states of matter solid, liquid, gas
subscripts show the number of atoms of an element in a molecule or the ratio of elements in a compound.
synthesis reaction 2 substances combine to form a new compound (also called composition reaction)
Created by: 150015004



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