HC Unit 7 crossword

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Across
  1. 2. chemical reaction that involves the release of energy in the form of heat or light
  2. 4. the total heat content of a system
  3. 6. 2 atoms slam together to form into a heavier atom
  4. 8. the symbol for enthalpy change
  5. 9. branch of chemistry concerned with he quantities of heat evolved or absorbed during chemical reactions
  6. 11. the transition from the solid phase to the gas phase
  7. 12. two substances in physical contact with each other exchange no heat energy
  8. 13. everything that is not directly involved in the reaction
  9. 15. process of measuring the amount of heat released or absorbed during a chemical reaction
  10. 16. the process in which liquid state changes into the vapor state
Down
  1. 1. show the temperature change as a substance is heated up/ cooled down
  2. 3. when a gas turns into a liquid
  3. 5. the amount of energy absorbed from one system to its surroundings
  4. 7. collection of objects that can be identified
  5. 10. chemical reactions in which the reactions absorb heat energy from the surroundings to form products
  6. 14. transition of a substance directly from a gas to a liquid