1. 20 pt 30 pt 40 pt 50 pt 10 pt 20 pt 30 pt 40 pt 50 pt 10 pt 20 pt 30 pt 40 pt 50 pt 10 pt 20 pt 30 pt 40 pt 50 pt 10 pt 20 pt 30 pt 40 pt 50 pt 10 pt States of Matter Phase Changes Gas Pressure Gas law 1 Gas Law 2

2. Name three states of matter

3. Solid, liquid and gas

4. Forces of attraction are stronger between the solid particles (True/False)

5. True

6. In which state of matter the forces of attraction among the particles are so weak that they can be ignored under ordinary conditions?

7. Gas

8. Which of the following phase changes is an endothermic change? a. condensation b. vaporization c. deposition d. freezing

9. b. vaporization

10. Which of the following phase changes is an exothermic change? a. sublimation b. deposition c. vaporization d. melting

11. b. deposition

12. The phase change in which a substance changes from a liquid to solid is ________________

13. Freezing

14. During a phase change, the temperature of a substance does not change (True/False)

15. True

16. The phase change in which a substance changes from a solid to a gas or vapor without changing to a liquid is __________________.

17. Sublimation

18. The phase change in which a substance changes from gas directly to a solid is _______.

19. Deposition

20. a e b d cf Complete the phase change Diagram (vaporization, melting, condensation, deposition, freezing, sublimation) Solid Liquid Gas

21. a.Melting b.Freezing c.Vaporization d.Condensation e.Sublimation f.deposition

22. It is defined as force per unit area

23. Pressure

24. What are three factors that affect gas pressure

25. Temperature, Volume and number of gas particles

26. If the number of particles of gas is increased, the gas pressure will__________.

27. Increase

28. It is caused by collisions between the gas particles and the walls of the closed container.

29. Gas Pressure

30. What are units of pressure

31. Pascals

32. Lowering of the temperature will cause a decrease in gas pressure in a closed container? True/False

33. True

34. P1V1= P2V2 is the mathematical equation for which law

35. Boyle’s Law

36. The increase in the size of marshmallow in the vacuum pump demonstrate which law?

37. Boyle’s law

38. P1 = 20 P2= 50 V1=100 V2= ? Hint: P1V1=P2V2

39. V2= 40

40. If the volume of a cylinder is reduced from 8.0 liters to 4.0 liters, the pressure of the gas in the cylinder will change from 200 kilopascals to what new pressure? Hint: Use equation P1V1 = P2V2 P1V1/V2 = P2

41. 400 Kilopascals

42. Which law states that the volume of a gas is inversely proportional to its pressure if the temperature and number of particles are constant

43. Boyle’s Law

44. is the mathematical equation for which law

45. Charles’s law

46. This law states that the volume of the gas is directly proportional to its temperature in Kelvin.

47. Charles’s law

48. The increase in the size of balloon in the beaker containing boiling water demonstrate which law?

49. Charles’s Law

50. T1= 20 T2=40 V1= 3 V2= ? Hint

51. V2= 6