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Across
  1. 2. Portion of universe studied
  2. 5. Homogeneous part of a system
  3. 7. Energy transfer involving force and distance
  4. 8. Total heat content of a system
  5. 13. No heat exchange with surroundings
  6. 14. Process requiring external energy
  7. 15. Measurement of heat changes
  8. 18. Transition between states of matter
  9. 19. Measure of disorder or randomness
  10. 20. Highest temperature and pressure for liquid phase
  11. 22. Depends on how change occurs
  12. 23. Scientist who defined free energy
  13. 24. Energy available to do work
  14. 25. Releases heat energy
Down
  1. 1. Device measuring heat of combustion
  2. 3. Process occurring without outside help
  3. 4. Everything outside the system
  4. 6. Property depending only on current state
  5. 9. Heat required to raise temperature
  6. 10. Temperature and pressure where all phases coexist
  7. 11. Constant temperature process
  8. 12. Study of energy transformations
  9. 16. Absorbs heat energy
  10. 17. Heat per gram per degree Celsius
  11. 21. States heat change is path-independent