Chemical Reaction- a well- defined example of a chemical change. One or more substances are changed into new substances.
What makes up a chemical reaction?
1. Reactants - substances you start with
2. Products - substances you end with
Reactants -> Products
Balanced chemical equation- same number of atoms of each element on both sides of the equation.
Remember atoms are rearranged but never lost or destroyed.
Activation energy- minimum amount of energy needed for reactants to form products in a chemical reaction. Endothermic Reaction- absorbs heat energy Exothermic Reaction- releases energy in the form of heat.
Catalyst- substance that lowers the activation energy needed to start a chemical reaction. -It speeds up the reaction but does not increase how much product is made. It also does not get used up. Enzymes- special proteins that are biological cataylsts. Ex: Amylase found in saliva.
Substrates- reactants that bind to the enzyme. Active site- specific location where a substrate binds on an enzyme.