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Chemical Reactions 6.2.notebook
1
November 08, 2012
Chemical ReactionsSection 6.2
Reactants and Products
Chemical reaction the process by which atoms or groups of atoms in substances are reorganized into different substances.
Fe + O2 becomes Fe2O3
Chemical Equations
Reactants starting substances on the left side of the arrow.
Products the substances formed during the reaction on the right side of the arrow.
C6H12O6 + O2 CO2 + H2O
Reactants Products
Balanced Equations the number of atoms of each element on the reactant side must equal the number of atoms on the same element on the product side.
C6H12O6 + 6O2 6CO2 + 6H2O
C=__H=___O=___ C=___H=___O=___
Multiply the coefficient by the subscript for each element.
Coefficients
Subscripts
Chemical Equations Continued
K + B2O3 K2O + B
HCl + NaOH NaCl + H2O
CH4 + O2 CO2 + H2O
N2 + H2 NH3
Al + S8 Al2S3
Balancing Equations PracticeActivation Energy the minimum amount of energy needed for reactants to form products in a chemical reaction.
Exothermic Reaction Endothermic Reaction Energy is released Energy is absorbed
X +Y
XY
Activation Energy
Energy ReleasedActivation Energy
XY
X +Y Energy Absorbed
Reactants Products
Activation energy and Energy Change
Chemical Reactions 6.2.notebook
2
November 08, 2012
Enzymes
Catalyst a substance that lowers the activation energy needed to start a chemical reaction.
Does not increase the amount of product used and is not used up.
Enzymes Special proteins that are biological catalysts that speed up the rate of chemical reactions in biological process.• Not used up• One enzyme for one reaction• Reusable• Lowers Activation Energy
Enzymes Continued
Substrates the reactants that bind to the enzyme.
Active Site a specific location where a substrate binds on an enzyme
Substrate must match size and shape of active site to bond.
Enzyme breaks bonds on the substate and forms new bonds forming the product.
pH, temperature and other factors may affect the activity of an enzyme
Attachments
Enzyme Activation Energy.png
enzyme substrate binding.gif
magnets.gif
water molecule.gif
Hydrogen bonding 1.jpg
Hydrogenbondinginwater.png
capillary action.jpg
cohesive.jpg
kool_aid_man_glass.jpg
saltwaterdrink.jpg
pouringmilk.jpg
hydroxide ion.jpg
pH scale.gif
acidsandbasesphscale.jpg
blood_cellscafleurebon.jpg
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