Types of reactions

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Across
  1. 1. Substances that react together to form products.
  2. 4. A type of decomposition reaction using heat.
  3. 5. A change where no new substances are formed.
  4. 7. Reaction where a fuel reacts with Oxygen producing thermal energy.
  5. 10. A type of combustion where there is insufficient Oxygen.
  6. 13. A gas produced during incomplete combustion.
  7. 14. Black particulates produced during incomplete combustion.
  8. 16. Substances formed in a chemical reaction.
  9. 17. A gas produced during complete combustion.
Down
  1. 2. This is the minimum amount of energy needed to start a reaction.
  2. 3. In theory this is always conserved in a chemical reaction.
  3. 6. Reaction giving out thermal energy to the surroundings.
  4. 8. A substance used to release thermal energy when reacted with Oxygen.
  5. 9. A change where new substances are formed.
  6. 11. A chemical used to speed up chemical reactions.
  7. 12. Reaction taking in thermal energy from the surroundings.
  8. 15. A gas needed for a combustion reaction.
  9. 18. A type of energy resource that is not running out.