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Across
  1. 3. Process at constant pressure
  2. 4. Minimum energy to remove electron
  3. 7. Transition between solid, liquid, gas
  4. 12. Minimum energy required to react
  5. 13. Natural tendency of process to occur
  6. 14. Device for measuring heat flow
  7. 15. Heat capacity per unit mass
  8. 18. Absorbs heat from surroundings
  9. 20. Process at constant volume
  10. 23. Ratio of products to reactants at balance
Down
  1. 1. Heat absorbed or released during phase change
  2. 2. Energy available to do work
  3. 5. Energy change during chemical reaction
  4. 6. Releases heat to surroundings
  5. 8. Process with no heat exchange
  6. 9. Energy required to raise temperature
  7. 10. Energy transfer by force over distance
  8. 11. Process at constant temperature
  9. 16. Speeds up reaction without being used up
  10. 17. Study of heat in chemical processes
  11. 19. Determines direction of reaction shift
  12. 21. Total enthalpy change independent of steps
  13. 22. SI unit of energy