qtr week 2.pptx

qtr week 2

1. QUARTER 4: WEEK 2 SCIENCE 10 Prepared by: Aple M. Rigor Teacher III

2. Prepare yourselves Dear Students

3. Bring out your Week 2 Module 1 in Science 10

4. Let’s do some Recap

5. What AM I ?

6. VOLUME I am one of the measurable properties of gas. I am denoted by the symbol V. I am the amount of space occupied by a gas sample. My SI unit is in liters (L) What Am I?

7. Pressure I am the next important measurable property of the gas, which is denoted by the symbol P. I am described as the force exerted by the gas per unit area. My unit can be ATM, Torr, Psi, Pa and mmHg What am I?

8. Temperature I am denoted by the letter T. My value depends on kinetic energy of gas. Gases expand when I increased. I can be expressed in Fahrenheit (◦ F), Centigrade or Celsius (◦C), and Kelvin (K). What am I?

9. The amount of gas I am another measurable property of gas. I am related to the number of moles of gas and is generally expressed in kilogram (kg) or gram (g). What am I?

10. MELC: Investigate the relationship between: 1 volume and pressure at constant temperature of a gas 2 volume and temperature at constant pressure of a gas 3 explains these relationships using the kinetic molecular theory

11. Lesson 2: Gas Law

12. Whats In: Activity 6 Directions : Identify the given pictures below by choosing the appropriate answers found inside the word pool.

13. Activity 6: Match Me Gas and volume Gas and temperature Gas and Pressure Gas and amount of gas

14. Activity 6: Match Me Gas and volume Gas and temperature Gas and Pressure Gas and amount of gas

15. Activity 6: Match Me Gas and volume Gas and temperature Gas and Pressure Gas and amount of gas

16. Activity 6: Match Me Gas and volume Gas and temperature Gas and Pressure Gas and amount of gas

17. Gas Law

18. Boyle’s Law Robert Boyle, an English chemist was the first to investigate the relationship between the pressure of a gas and its volume at a constant temperature. Based on his experiment made wherein he trapped a fixed amount of air in a J-tube and changed the pressure at a constant temperature, He found out that as THE PRESSURE INCREASES, THE VOLUME DECREASES. He then concluded that the volume occupied by the fixed amount of gas is inversely proportional to its pressure at a constant temperature

19. Formula in calculating the relationship between pressure and volume In Boyle’s law, the following formulas are to be used when three variables are given, and one is unknown: P1 = P2V2/V1 P2 = P1V1/V2 V1 = P2V2/P1 V2 = P1V1/P2

20. A sample of nitrogen gas (N2) has a volume of 12.0 L and a pressure of 760.0 mm Hg. When the gas is released, it gives 32.0 L of nitrogen. If the temperature is the same, what is the new pressure of nitrogen? First step is to identify the variables V1 V2 P1 P2

21. A sample of nitrogen gas (N2) has a volume of 12.0 L and a pressure of 760.0 mm Hg. When the gas is released, it gives 32.0 L of nitrogen. If the temperature is the same, what is the new pressure of nitrogen? V1= 12.0L P1= 760.0mmHg V2=32.0L P2=? P1 = P2V2/V1 P2 = P1V1/V2 V1 = P2V2/P1 V2 = P1V1/P2

22. A sample of nitrogen gas (N2) has a volume of 12.0 L and a pressure of 760.0 mm Hg. When the gas is released, it gives 32.0 L of nitrogen. If the temperature is the same, what is the new pressure of nitrogen? V1= 12.0L P1= 760.0mmHg V2=32.0L P2=? P2 = P1V1/V2

23. V1= 12.0L P1= 760.0mmHg V2=32.0L P2=? P2 = P1V1/V2 P2=760 mmHg(12 L)/32 L P2= 9120 mmHg L/32L P2= 285 mmHg

24. V1= 12.0L P1= 760.0mmHg V2=32.0L P2= 285 mmHg P2 = P1V1/V2 P2=760 mmHg(12 L)/32 L P2= 9120 mmHg L/32L P2= 285 mmHg THE PRESSURE INCREASES, THE VOLUME DECREASES vise versa

25. Charles Law French physicist Jacques Charles determined the volume-temperature relationship in gases. From his experiment on balloons, Charles observed that, at constant pressure, the volume of gas increases with every increase in temperature. Also, volume decreases as temperature decreases. Charles’ law states that the volume of a fixed amount of gas maintained at constant pressure is directly proportional to its absolute temperature

26. In Charles’ law, the following formulas are to be used when three variables are given, and one is unknown: V1 = V2T1/T2 V2 = V1T2/T1 T1 = V1T2/V2 T2 = V2T1/V1

27. A mountain climber inhales 484.0 mL of air at a temperature of -10.0oC. What volume (in mL) will the air occupy in the mountain climber’s lungs if his body temperature is 37.0 C assuming that the pressure remains the same? Given: V1 = 484.0 mL T1 = -10.0 C T2 = 37.0 C Find: V2

28. A mountain climber inhales 484.0 mL of air at a temperature of -10.0oC. What volume (in mL) will the air occupy in the mountain climber’s lungs if his body temperature is 37.0 C assuming that the pressure remains the same? Solution: Change the temperature to Kelvin when they are given in Celsius. T1 = -10.0 C + 273 = 263 K T2 = 37.0 C + 273 = 310 K

29. V1 = 484.0 mL T1 = -10.0 C (263k) T2 = 37.0 C (310k) Find: V2

30. Summary Boyle’s Law Charles Law Proponent Robert Boyle Jacques Charles Constant value Temperature and amount of gas Pressure and amount of gas Principle As the Pressure increases the Volume decreases vise versa As the Temperature Increases the Volume also increases Formula P1 = P2V2/V1 P2 = P1V1/V2 V1 = P2V2/P1 V2 = P1V1/P2 V1 = V2T1/T2 V2 = V1T2/T1 T1 = V1T2/V2 T2 = V2T1/V1

31. APPLICATION As an application, as you can see if there is huge fire you will see that as the temperature brought by the fire increases the volume of smoke also increases

32. DO YOU UNDERSTAND OUR LESSON?

33. ASSESSMENT Write/type Charles if the statement is for Charles law and Boyles if its for Boyles

34. Charles law As the Volume of Gas increase the temperature of Gas increases vise versa

35. Boyle’s law The Law states that as the Pressure increases the Volume decreases vise versa

36. Boyle’s law Temperature and amount of gas are constant

37. Charles law Pressure and amount of gas are constant

38. How was your score?

39. For your other activities Please read and analyze you lesson 2 modules and answer the ff. Activity 8 Crossword puzzle Activity 9 Problem solving (set a only) What I have learned page 22-23

40. Thank you for listening SCIENCE 10 4 th Quarter: Week 2