Cm33 - Understanding Understanding Chemical Reactions Lesson:Bonds&Energy BasicRevision BasicRevision ,bonds 4 4 Fe CuSO Cu FeSO BasicRevision

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Understanding  Understanding  Chemical  Chemical  Reactions Reactions Lesson: Bonds & Energy
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Basic Revision Basic Revision For a chemical reaction to occur, bonds  must be both formed and broken Fe  +  CuSO 4                Cu    +  FeSO 4
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Basic Revision Basic Revision Chemical reactions always involve energy  changes. Making and breaking bonds involves  energy changes
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ENERGY AND CHEMICAL  ENERGY AND CHEMICAL  REACTIONS REACTIONS Exothermic reactions These reactions give out heat energy. Combustion is an exothermic reaction.
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ENERGY AND CHEMICAL  ENERGY AND CHEMICAL  REACTIONS REACTIONS Endothermic reactions These reactions take in heat energy from  their surroundings. These cause temperatures to fall.
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ENERGY AND CHEMICAL  REACTIONS REACTIONS Use the apparatus as  shown. Work with 20ml of 
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Cm33 - Understanding Understanding Chemical Reactions Lesson:Bonds&Energy BasicRevision BasicRevision ,bonds 4 4 Fe CuSO Cu FeSO BasicRevision

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