Unit 5: Energy Changes

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Across
  1. 2. A reaction that releases energy and may increase temperature
  2. 8. The product of a combustion reaction
  3. 9. A chemical reaction when a substance combines with oxygen
  4. 10. The product of an oxidation reaction
Down
  1. 1. A hydrocarbon that's burned to release energy
  2. 3. A reaction that absorbs energy & can cause lower temperature
  3. 4. A compound that only has carbon and hydrogen & can be used as a fuel
  4. 5. A negatively charged compound formed when a base dissolves in water
  5. 6. A compound that forms H+ ions in solution
  6. 7. Hydrocarbon (fuel) + oxygen --> carbon dioxide + water