C7 - Energy Changes

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Across
  1. 3. The difference in energy of the reactants to the products 6,2,8
  2. 7. Releases energy 6,5.
  3. 8. A graphical diagram showing the change in energy in a reaction 8,7.
  4. 10. Exothermic reactions _________ the temperature of the surroundings.
  5. 12. The area that is thermally changed by a reaction.
  6. 13. Endothermic reactions are used in this medical item. 4,4
  7. 14. Exothermic reaction involving H+ and OH- ions.
  8. 15. Endothermic reactions _________ the temperature of the surroundings.
  9. 16. Endothermic reaction combining water and carbon dioxide.
  10. 17. Negative ΔH.
  11. 19. Energy required to break the bonds in the reactants 10,6.
  12. 20. Sum of the energy in the bonds of the reactants minus the sum of the bond energy in the products. 4,6,11.
  13. 21. Endothermic reaction involving a solute and a solvent.
  14. 22. Must be broken into individual atoms before a reaction can take place.
Down
  1. 1. Requires energy 8,5.
  2. 2. Exothermic reactions are used in these comforting products. 4,6.
  3. 4. In chemical reactions energy is either ________ to, or from, the surroundings.
  4. 5. The units for this is kJ per mole, (kJ/mol). Usually given in a table in infomation 4,6.
  5. 6. Positive ΔH.
  6. 9. X-axis on the graphical diagrams showing change in energy 8,7.
  7. 11. Will be formed with new chemical bonds.
  8. 18. Exothermic reaction combining a fuel with oxygen.
  9. 21. ΔH 5,1