Chapter 6 2
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Chapter 6 2

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Chapter 6 2 Chapter 6 2 Presentation Transcript

  • Chemical Reactions
    • 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.