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Energy transfer in reactions
exothermic <ul><li>A reaction that gives energy  out,  usually in the form of heat. Usually shown  by a  rise  in temperat...
endothermic <ul><li>A reaction that takes  in  energy from the surroundings. Usually shown  by a  fall  in temperature </l...
Rearrangement of atoms  (HT) <ul><li>In a reaction,  reactants  are turned into  products </li></ul><ul><li>In order to do...
(HT) reactants atoms products Carbon And oxygen Carbon dioxide Bonds made Bonds broken
Breaking and making  (HT) <ul><li>Energy is needed to break bonds </li></ul><ul><li>And is released when bonds are made </...
Energy changes  (HT) <ul><li>In an exothermic reaction, more energy is released by making bonds in the products than by br...
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Energy Transfer In Reactions

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Transcript of "Energy Transfer In Reactions"

  1. 1. Energy transfer in reactions
  2. 2. exothermic <ul><li>A reaction that gives energy out, usually in the form of heat. Usually shown by a rise in temperature </li></ul><ul><li>E.g. burning fuels, neutralisation, adding water to anhydrous copper sulphate </li></ul>
  3. 3. endothermic <ul><li>A reaction that takes in energy from the surroundings. Usually shown by a fall in temperature </li></ul><ul><li>E.g photosynthesis, ammonium nitrate and water, decomposition of calcium carbonate or malachite (copper carbonate) </li></ul>
  4. 4. Rearrangement of atoms (HT) <ul><li>In a reaction, reactants are turned into products </li></ul><ul><li>In order to do this, the atoms of the reactants must be pulled apart by breaking the bonds between them. </li></ul><ul><li>Bonds between the atoms of the new products must then be made </li></ul>
  5. 5. (HT) reactants atoms products Carbon And oxygen Carbon dioxide Bonds made Bonds broken
  6. 6. Breaking and making (HT) <ul><li>Energy is needed to break bonds </li></ul><ul><li>And is released when bonds are made </li></ul><ul><li>Breaking bonds is endothermic </li></ul><ul><li>Making bonds is exothermic </li></ul>
  7. 7. Energy changes (HT) <ul><li>In an exothermic reaction, more energy is released by making bonds in the products than by breaking bonds in the reactants </li></ul><ul><li>In an endothermic reaction, more energy is needed to break bonds in the reactants than is released by making bonds in the products </li></ul>
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