physical behavior of matter part 2

cross-word puzzle

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1. the opposite of vaporization

4. energy released

6. energy absorbed

8. real gases can only come close to being this gas

10. a change that produces matter with a different composition than the original matter

15. it happens when vapor pressure is equal to external pressure

16. measurement of the average kinetic energy of the particles in a sample of material

19. the opposite of melting

20. the heat needed to melt 1 gram of a solid at constant temperature

21. stored energy

Down

2. the energy associated with the random motion of atoms

3. the change from solid to liquid phase

5. during this process, some properties of a material change, but the composition of the material does not change

6. the change from liquid to gas at all temperature

7. always present at a phase change

9. the opposite of sublimation

11. a theory states that a reaction is most likely to occur if reactant particles collide with the proper energy and orientation

12. the heat needed to vaporize 1 gram of a liquid at constant temperature

13. the apparent direct change from solid to gas phase

14. a transfer of energy from a body of higher temperature to a body of lower temperature

17. energy of motion

18. the pressure exerted by gaseous particles