Across
- 2. involving substances in different phases
- 5. a reaction accompanied by the release of heat
- 12. unit of work or energy
- 14. measuring the amount of heat
- 15. chemically inactive
- 16. physical substance in general
- 18. do not depend on the amount of the substance
- 19. do change the chemical nature of matter.
- 20. the degree or intensity of heat present in a substance
Down
- 1. a reaction requiring the absorption of heat
- 3. do not depend on the amount of the substance
- 4. composed of two or more substances
- 6. composed of two or more separate elements
- 7. chemical composition or identity of the substance is changed
- 8. substances that are made of only one type of atom
- 9. form of energy that flows between two samples of matter
- 10. substances that cannot be chemically interconverted
- 11. heat required to raise the temperature
- 13. mixtures which are in a single phase
- 17. substances that are made of only one type of atom