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Chemistry Part 2

Vocabulary

TermDefinition
Activation Energy what is needed to start a chemical reaction
Arrow also known as yields in a chemical equation or formula
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 from of a chemical formula in a equation. Tells how many atoms or molecules of each reactant and product take part in the reaction
Conservation of Mass the amount of matter involved In a chemical reaction does not change. The total mass of the reactants must equal the total mass of the products.
Concentration amount of one material in a given amount of another material
tgemperature higher heat causes faster reactions
Surface Area increased surface area = increased reaction
Catalysts materials that increases the rate of reaction
Enzymes biological catalysts
Inhibitors decreases the rate of a reaction
Decomposition Reaction a compound breaks down into simpler substances
Endothermic Reaction an observable change in energy that shows a chemical reaction took place; a reaction that takes heat from the solution, absorbs energy, makes it feel cooler
Exothermic Reaction and observable change in energy that shows a chemical reaction took place; a reaction that releases heat; gives off energy, makes it feel warmer; most chemical reactions are this type
Physical Changes alter only the physical properties of matter; no new substances are formed. Can be a change in size, shape, or color; change in phase
Precipitate a solid that forms from solution during a chemical reaction; observable change that shows a chemical reaction took place
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 a 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 and element in a molecule or the ratio of elements in a compound
Synthesis Reaction two substances combine to form a new compound
Created by: 150007803
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