Charles Law Power point Presentation. pptx

Charles Law Presentation

1. WELCOME SCIENCE EXPLORER Prepared By: Ms. Mariann Joy Tanilon

2. Classroom Rules

3. pea Lets have a recap! 1. What was our last topic? 2. What is the concept of Boyle’s Law ? 3. Who proposed the Boyle’s Law? 4. What is the general formula of Boyle’s Law?

4. SAY MY NAME

5. +   PHYSICS Example pea + sick

6. +   +   + TEMPERATURE 1 Team + pea + rate + ture

7. +   KELVIN 2 Kill + vane

8. +   VOLUME 3 Ball + Hume

9. +   PRESSURE 4 press + sure

10. +   GAS LAW 5 Gas + Law

11. Activity 2

12. pea Guide Questions 1. What was our last topic? 2. What is the concept of Boyle’s Law ? 3. Who proposed the Boyle’s Law? ? 1 . What happened to the balloon when the bottle was placed in hot water? 2. What happened to the balloon change in size in different temperature? 3. What does this experiment show about the relationship between the temperature and gas volume?

13. CHARLES ’ LAW

14. Learning Objectives Describe the relationship between volume and temperature at constant pressure of a gas, Solve problems involving changes in the condition of the gas using the equation for Charles’ Law. Appreciate the role of Charles’ Law in everyday life through examples .

15. Jacques Charles 1746-1823 He was a mathematician and physicist remembered for his pioneering work with gases and hydrogen balloon flights.

16. Jacques Charles 1746-1823 studied the relationship between volume and temperature held at constant pressure.

17. Charles Law

18. Charles Law Charles’ Law implies that the volume of a given amount of gas is di r ectly proportional to its absolute temperature (In Kelvin) when the pressure remains constant.As the temperature of a gas increases ,its volume expands and as the temperature decreases ,its volume contracts.

19. Charles Law Formula Where : V 1 = Initial volume V 2 = final volume T 1 = initial temperature T 2 = final volume

20. Charles Law In Charles Law, the temperatures are conventionally measured in Kelvin, the SI unit of temperature. The absolute temperature scale was devised by the English physicist Kelvin , so temperatures on this scale are called Kelvin (K) temperatures.

21. Charles Law Kelvin scale must be used because zero on the Kelvin scale corresponds to a complete stoppage of molecular motion.

22. CONVERSION OF CELSIUS TO KELVIN Formula: K= ° C+ 273.15

23. CONVERSION OF CELSIUS TO KELVIN Example: 1. 25 ° C 2. -10 ° C 3. 66 ° C 4. 37 ° C

24. Examples of Charle s ’ Law 1. Hot Air Balloon 2 . Bread

25. Step s to follow in Problem Solving Step 1. Write the Given Step 2. Conversion temperatures to Kelvin Step 3 . Write the Formula Step 4. Rearrange the formula Step 5. Substitution of Value Step 6. Conclusion

26. Practice Problem 1 An inflated balloon with a volume of 0.75 L at 30 ° C was placed inside the freezer where the temperature is -10 ° C. Find out what will happen to the volume of the balloon if the pressure remains constant.

27. Practice Problem 2 The volume of a given mass was 60 mL at 27 ° C. After heat was applied to the gas, its volume increased to 70 mL .If the pressure was held constant, what is the new temperature of the gas?

28. Activity 3: Solve It! 1.A gas has a volume of 2L at 300K. What will its volume be at 400K if pressure remains constant? 2 . A gas at 400 K is compressed from 4L to 2.8L. What was its initial temperature?

29. Direction: Determine whether each statement is an application of Charles law. Write YES if it is and NO if it is not. Use 1/4 sheet of paper for your answer. ACTIVITY 4: Charles Law, YES OR NO?

30. 1.Jogging is very difficult in during the month of December compare to the month of April. The reason is simply due to low temperatures our lungs shrink which decrease the human lungs' capacity. 2.A pressure cooker reducing the cooking time of food. 3. When ascending or descending in a plane, or taking a subway or train under a deep waterway, your ears "pop," or feel uncomfortable. 4.When bloated pool floats are pushed into pools, they appear as under-inflated. 5. Turkey thermometer is placed in the turkey. As the temperature increases and the turkey cooks, the air in the thermometer expands to pop the plunger.

31. Quiz Time!

32. A. Multiple choice. Directions: Write the letter of the correct answer in 1/2 crosswise. 1.Who was the French scientist who made accurate observations on how the volume of the gas is related to temperature? a.Amedeo Avogadro c. Jacques Charles b.Gay-Lussac d. Robert Boyle

33. 2.What temperature scale must be used when applying Charles' law? a. Celsius c. Kelvin b. Fahrenheit d. Both a & b

34. 3.Which of the following quantities are directly proportional in Charles’ Law? a.number of moles and volume b. pressure and temperature c. volume and pressure d. volume and temperature

35. 4.Which of the following illustrates the mathematical statement of Charles’ Law? a. P1V1 = P2V2 c. P1T1 = P2 T2 b. V1/T1 = V2/T2 d.VIP1/T1=V2P2/T2

36. 5.Which of the following is constant when using the Charles’ Law? a.energy c. temperature b. pressure d. volume

37. 6.Which of the following involved the application of Charles’ Law? a.bicycle pump c. soda cans/bottles b. scuba diving d. syringes

38. 7.What is the equivalent value of 25⁰C in Kelvin? a.11 K b. 248.15 K c. 298.15 K d. 6,829 K

39. 8.Which statement describes the volume-temperature relationship in gases at constant pressure? a.As temperature decreases, volume increases. b.As temperature increases, volume also increases. c.As temperature increases, volume remains constant. d. As temperature remains constant, volume increases.

40. B.Problem Solving Directions: Solve the problem and show your solutions.(12 pts.) 1.A neon gas at 760 mm Hg has a volume of 12. 0 L and a temperature of 44 ° C. Find the new volume of the gas after the temperature has been increased to 85 ° C at 760 torr.

41. ASSIGNMENT

42. Direction: Create 2 drawings that illustrate real-life example of Charles Law and write 1-3 sentence explanation. Criteria: Accuracy 5 Clarity of drawings 5 Explanation 5 Creativity and Presentation 5 Total: 20

43. Thank you for listening