Across |
1. | The __________ __________ __________ is the temperature at which the liquid and gas have a vapor pressure equal to 1 atm. |
5. | __________ __________ is the amount of energy needed to change a substance from a soild to a liquid and vice versa. |
7. | What is liquid water freezing into a solid piece of ice and example of? |
9. | The __________ point of water is at zero degrees Celcius. |
12. | What happens to high energy particles that approach the surface? |
13. | __________ __________ is the energy of motion, observable as the movement of an object, particle, or set of particles. |
14. | A substance that consists of individual molecules held together in the solid by relatively weak intermolecular bonds is called a __________ __________. |
16. | What is the point at which the substance cannot liquify anymore? (also known as the point of no return) |
21. | What type of intermolecular force holds polar molecules together? |
22. | The particles that make up a __________ vibrate in place and create a definite shape. |
24. | __________ __________ is the amount of energy a substance needs to change from a liquid to a gas state and vice versa. |
28. | The __________ __________ is where all 3 phases of matter are at equilibrium. |
29. | The particles of a __________ move freely and bounce off one another. |
30. | What type of intermolecular force holds non-polar molecules together? |
31. | A __________ __________ shows the temperature vs. time for a substance where energy is added at a constant rate. |
32. | When ice melts into water, it is visible that __________ has occured. |
33. | When ice is __________, a phase change occurs. |