AP Chem Unit 6

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Across
  1. 4. There is only ___ and the absence of ____
  2. 5. Overall enthalpy change in a reaction equals the sum of enthalpy changes for the individual steps.
  3. 6. In a ___ system, heat can flow in and out, but matter cannot.
  4. 12. If ∆H is ____ zero, the reaction is endothermic because more energy is needed to break bonds.
  5. 14. In an endothermic reaction, the surroundings get ___ in temperature.
  6. 15. A substance with low specific heat capacity has less ___ to temperature changes.
  7. 17. ___ energy is in molecules in motion
  8. 20. Stable compounds have a large ____ enthalpy of formation.
  9. 21. If a substance has high specific heat capacity, it is ____ to change its temperature.
  10. 22. ____ capacity is the energy required to raise the temperature of one gram of a substance by one degree C.
  11. 23. ____ is associated with expanding or contracting gases
  12. 24. Difference in energy between bonds broken and bonds formed
  13. 25. Average value of gas-phase bond dissociation energy
Down
  1. 1. During heat transfer, total energy is ___.
  2. 2. device used to measure heat content
  3. 3. When only potential energy is changing, the substance is undergoing a ____ ____.
  4. 7. In this type of reaction, energy is released by the system.
  5. 8. experiment to determine specific heat of a substance
  6. 9. ____ energy is contained in bonds
  7. 10. A coffee cup calorimeter is a type of constant ___ calorimetry.
  8. 11. The heat content of a system
  9. 13. the ability to do work
  10. 16. A property that is independent of the pathway.
  11. 18. If heat is added to the system, during a reaction, that reaction is ___.
  12. 19. First step to determine bond enthalpy is to draw the ____ for all species.