Chemistry and Energy

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Across
  1. 2. Refers to the heat content of a system.
  2. 5. _______ is a measure of energy and is represented by a J.
  3. 7. Δ this symbol means ________.
  4. 8. Amount of energy needed for a reaction to progress.
  5. 10. Graphs that show the potential energy of a system as a reaction progresses.
  6. 11. When atoms lose electrons.
  7. 12. ΔH is _______ in exothermic reactions.
  8. 15. In an endothermic reaction, the energy of the reactants is ________ than the energy of the products.
  9. 17. _______ energy: The energy stored in the bonds of a substance.
  10. 19. To calculate the enthalpy of a reaction, you take the ____ of the enthalpy of the products and subtract it from the sum of the enthalpy of the reactants.
  11. 20. The flow of electrons.
  12. 21. ΔH is _______ in endothermic reactions.
  13. 22. The half cell of a battery where atoms are oxidized.
  14. 23. In an exothermic reaction, the energy of the reactants is _______ than the energy of the products.
Down
  1. 1. Reactions or processes that absorb energy from the surroundings.
  2. 3. In-between of the reactants and products. Has high energy and is unstable.
  3. 4. Energy is _________ when bonds form.
  4. 6. This law states that matter cannot be created or destroyed, it can only be transferred or transformed.
  5. 9. Reactions or processes that release energy to the surroundings.
  6. 13. Batteries convert chemical potential energy into _______ energy.
  7. 14. ΔH is always ________ for combustion reactions.
  8. 16. When ions gain electrons.
  9. 17. The half cell of a battery where ions are reduced.
  10. 18. Energy is _________ when bonds break.