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Chemical Reactions

Chapter 6
by

Katie Hermens

on 12 September 2014

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Transcript of Chemical Reactions

process of atoms or groups of atoms in substances are REORGANIZED into different substances
Chemical Reactions
Reactants Products
Chemical Equations
C6H12O6 + 6O2 6CO2 + 6H2O
Example:
Reactants
Products
energy is gained (absorbed) during the reaction
Endothermic Reaction
energy is released during the reaction
Exothermic Reaction
(a) = activation energy (energy needed for the reaction to occur)
Lowers activation energy
Speeds up chemical reaction
Does NOT get used up in reaction
Does NOT increase amount of product made
Also known as a "biological catalyst"
Enzymes
Lock & Key Theory
Substrates = the reactant(s) that bind to the enzyme
Active site = location where substrate binds to enzyme
apple ripening
snake venom
digestion
Enzyme biological processes
Enzyme Examples: (all end in -ase)
Amylase - breaks down amylose
Protease - breaks down protein
light
heat
color change
gas production
odor
sound
How do you know a chemical reaction occurred?
Physical changes usually involve just a change in "state"
Full transcript