states of matter

2. states that the volume of a gas is directly proportional to its temperature in kelvins if the pressure and the number of particles of the gas are constant
4. the reversibly physical change that occurs when a substance changes from one state of matter to another
6. the state of matter in which a material has neither a definite shape nor
9. the state of matter in which a material has a definite volume but not a definite shape
11. when the system releases energy to its surroundings
13. when a gas or vapor changes directly into a solid without first changing to a liquid
14. states that the volume of a gas is inversely proportional to its pressure of the temperature and the number of particles are constant
16. the energy a substance must absorb in order to change from a liquid to a solid
18. the phase change in which a substance changes from a gas or vapor to a liquid
19. the phase change in which a substance changes from a liquid to a gas

1. the result of a force distributed over an area
3. the process that changes a substance from a liquid to a gas at temperatures below the substance's boiling point
5. the amount of energy a substance must absorb in order to change from a solid to a liquid
7. a temperature of 0 kelvins
8. the energy an object has due to its motion
10. the phase change in which a substance changes from a solid to a gas or vapor without changing into a liquid first
12. when the system absorbs energy from its surroundings
15. pressure the pressure caused by the collisions of this vapor and the walls of the container
17. the state of matter in which materials have a definite shape and a definite volume