Term | Definition |
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) |