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Chapter 6 2

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Chapter 6 2

  1. 1. Chemical Reactions
  2. 2. <ul><li>Chemical Reaction- a well- defined example of a chemical change. One or more substances are changed into new substances. </li></ul>
  3. 3. <ul><li>What makes up a chemical reaction? </li></ul><ul><li>1. Reactants - substances you start with </li></ul><ul><li>2. Products - substances you end with </li></ul><ul><li>Reactants -> Products </li></ul>
  4. 4. <ul><li>Balanced chemical equation- same number of atoms of each element on both sides of the equation. </li></ul><ul><ul><li>Remember atoms are rearranged but never lost or destroyed. </li></ul></ul>
  5. 5. 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.
  6. 6. 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.
  7. 7. Substrates- reactants that bind to the enzyme. Active site- specific location where a substrate binds on an enzyme.

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