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BBS C2 Chemical Reactions

  1. What do we call a reaction that gives out heat energy so the temperature increases?
    Exothermic
  2. What do we call a reaction that takes in heat energy so the temperature decreases?
    Endothermic
  3. What does BENDOMEX stand for?
    Bond Breaking is ENDOthermic bond Making is EXothermic
  4. How can you measure a temperature change in a reaction?
    Use a thermometer and take the temperature Before and After the reaction
  5. What type of energy change does this represent?
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    Exothermic
  6. What type of an energy change does this represent?
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    Endothermic
  7. Which 4 factors can affect the rate of a reaction?
    • Temperature
    • Concentration
    • Surface Area
    • Catalyst
  8. Which has a bigger surface area, lumps or powder?
    Powder
  9. Why does increasing the temperature increase the rate of the reaction?
    • The particles move quicker 
    • so there are more frequent collisions 
    • and more frequent successful collisions
  10. Why does increasing the concentration increase the rate of the reaction?
    • There are more particles of the reactant
    • so there are more frequent collisions 
    • and more frequent successful collisions
  11. Why does increasing the surface area increase the rate of the reaction?
    • There is a larger area to react with
    • so there are more frequent collisions 
    • and more frequent successful collisions
  12. What is a catalyst?
    It speeds up a reaction but remains chemically unchanged
  13. What must particles do in order to cause a reaction?
    Collide with enough energy
  14. How could you measure the rate of a reaction?
    • Time how long it takes to produce a certain volume of gas
    • Time how long it takes to stop reacting
  15. Where is a catalytic converter found and what does it do?
    • Vehicle exhausts
    • It converts poisonous gases into less harmful ones through OXIDATION
  16. If you are asked to draw a graph to show the effect of changing something which affects the rate of the reaction, what should you make sure you do?
    Start at the same point and end at the same point

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Author
across2015
ID
331709
Card Set
BBS C2 Chemical Reactions
Description
BBS C2 Chemical Reactions
Updated

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