L1_Gas Law.pptxbhkgvdsdhvshvdkhsafsfzdfrf

gas laws

1. POST-TEST 4th Grading Period (S.Y. 2023-2024)

2. 1. What is the name of the principle stating that the pressure of a gas is inversely proportional to its volume, provided that the temperature and the amount of gas remain constant? a) Boyle's Law b) Charles's Law c) Avogadro's Law d) Dalton's Law

3. 2. If the volume of a gas is decreased while keeping the temperature and the amount of gas constant, what happens to its pressure according to Boyle's Law? a) Increases b) Decreases c) Remains constant d) Doubles

4. 3. Which gas law states that the volume of a gas is directly proportional to its temperature in Kelvin, provided that the pressure and the amount of gas remain constant? a) Boyle's Law b) Charles's Law c) Avogadro's Law d) Gay-Lussac's Law

5. 4. If the temperature of a gas is doubled while keeping the pressure and the amount of gas constant, according to Charles's Law, what happens to its volume? a) Doubles b) Halves c) Quadruples d) Remains constant

6. 5. Which gas law describes the relationship between the pressure and temperature of a gas, when the volume and the amount of gas are kept constant? a) Boyle's Law b) Charles's Law c) Avogadro's Law d) Dalton's Law

7. 6. If the pressure of a gas is increased while keeping the temperature and the volume constant, according to Gay-Lussac's Law, what happens to its temperature? a) Increases b) Decreases c) Remains constant d) Doubles

8. 7. What is the mathematical representation of Boyle's Law? a) P1V1 = P2V2 b) V1/T1 = V2/T2 c) P1/T1 = P2/T2 d) PV = nRT

9. 8. If the number of moles of a gas is doubled while keeping the temperature, pressure, and volume constant, according to Avogadro's Law, what happens to its volume? a) Doubles b) Halves c) Quadruples d) Remains constant

10. 9. Which gas law states that the total pressure exerted by a mixture of gases is equal to the sum of the partial pressures of each individual gas in the mixture? a) Boyle's Law b) Charles's Law c) Avogadro's Law d) Dalton's Law

11. 10. What is the SI unit of pressure? a) Pascal (Pa) b) Kelvin (K) c) Cubic meter (m^3) d) Gram (g)

12. 11. Avogadro's law states that, at constant temperature and pressure, equal volumes of gases contain an equal number of molecules. What does this imply about the molar volume of gases? a) it varies with temperature b) it varies with pressure c) it is constant d) it is unrelated to the number of molecules

13. 12. Boyle's Law describes the relationship between which two properties of a gas? a) Pressure and volume b) Volume and temperature c) Pressure and temperature d) Temperature and moles

14. 13. According to Boyle's Law, if the volume of a gas is decreased while keeping the temperature constant, what happens to its pressure? a) It decreases b) It increases c) It remains the same d) It fluctuates

15. 14. Charles's Law describes the relationship between which two properties of a gas? a) Pressure and volume b) Volume and temperature c) Pressure and temperature d) Temperature and moles

16. 15. At constant pressure, what happens to the volume of a gas if its temperature is raised according to Charles's Law? a) It increases b) It decreases c) It remains the same d) It fluctuates

17. Properties of Gases Expansion (no definite shape and volume) Compressibility (Pressure volume gas molecules move closer) Diffusion and Effusion (spread out and mix other gases easily) Low density (lighter and easier to move, atmosphere) Kinetic Molecular Theory (atom/molecules) ( temperature) Pressure (no. molecules, speed and volume- Boyle’s law Temperature ( KME)  

18. GAS LAWS Volume Pressure Temperature

19. OBJECTIVES By the end of the lesson, students will be able to explain the relationships between volume, pressure, and temperature of gases as described by Boyle's Law, Charles's Law, and the combined gas law.

20. Gas laws form the foundation of our understanding of the behavior of gases under various conditions . From the everyday applications of gas pressure to the intricate workings of gas molecules in scientific experiments, the principles of gas laws are omnipresent.

21. Graham’s Law of EFFUSION The kinetic energy of a gas molecule is related to its velocity, as expressed by the equation: W here m = mass; and v = velocity of the molecule  

22. Based on the equation, the velocity of a gas is inversely proportional to its mass. Hence, the lighter gas molecule have a greater velocity than heavier ones . At the same temperature, all gases have the same kinetic energy. Therefore, for any two gases at a given temperature,  

23. 1. ROBERT BOYLE in the 17th century, describes the inverse relationship between the pressure and volume of a gas at constant temperature. In simple terms, it states that when the volume of a gas decreases, its pressure increases, and vice versa, provided the temperature remains constant. ​

24. 1. A gas occupies a volume of 4.0 L at a pressure of 2.0 atm. If the volume is decreased to 2.0 L, what will be the new pressure assuming constant temperature?

25. 2. A gas at 3.0 atm pressure occupies a volume of 10.0 L. If the pressure is decreased to 2.0 atm, what will be the new volume assuming constant temperature?

26. 2. CHARLES'S LAW, proposed by Jacques Charles in the late 18th century, elucidates the direct relationship between the volume and temperature of a gas at constant pressure. It states that the volume of a gas is directly proportional to its absolute temperature, provided the pressure remains constant.

27. 1. A gas occupies a volume of 2.0 L at a temperature of 273 K. If the temperature is increased to 373 K, what will be the new volume assuming constant pressure?

28. 2. A gas occupies a volume of 5.0 L at a temperature of 300 K. If the temperature is decreased to 200 K, what will be the new volume assuming constant pressure?

29. 3. AVOGADRO'S LAW, formulated by Amedeo Avogadro in the 19th century, establishes that equal volumes of gases at the same temperature and pressure contain an equal number of molecules. In essence, it states that the volume of a gas is directly proportional to the number of moles of gas present, provided the temperature and pressure remain constant.

30. 1. A sample of gas occupies a volume of 10.0 L at a pressure of 1.0 atm and a temperature of 273 K. How many moles of gas are present?

31. 2. If 0.5 moles of gas occupy a volume of 22.4 L at a pressure of 1.0 atm and a temperature of 273 K, what will be the new volume if the number of moles of gas is doubled?

32. POST-TEST 4th Grading Period (S.Y. 2023-2024)

33. Laboratory activity

34. Materials 1 Balloon Pump 2 PET Bottles 2 Balloons 1 Straw Water 1 Scissor 1 Cutter Tape

35. Laboratory activity

36. MATERIALS 1 Balloon Pump 2 Balloons 1 Tape Measure 1 Cooler with Ice

37. Laboratory activity

38. MATERIALS 1 Vinegar 1 Baking Soda 3 Balloons