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Feb. 10, 2014

Feb. 10, 2014. AGENDA: 1 – Bell Ringer 2 – Review HW (Boyle’s) 3 – Demo: Boyle’s Law 4 – CN: Charles’ Law 5 – Practice Problems 6 – Demo: Charles’ Law 7 – Work Time. Today’s Goal: Students will be able to calculate using Charles’ Law. Homework Charles’ Law

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Feb. 10, 2014

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  1. Feb. 10, 2014 AGENDA: 1 – Bell Ringer 2 – Review HW (Boyle’s) 3 – Demo: Boyle’s Law 4 – CN: Charles’ Law 5 – Practice Problems 6 – Demo: Charles’ Law 7 – Work Time Today’s Goal: Students will be able to calculate using Charles’ Law. Homework • Charles’ Law • Make up Week 22 Quiz by Friday.

  2. Monday, Feb. 10 Objective: Students will be able to calculate using Charles’ Law. Bell Ringer: Use Boyle’s Law: P1V1 = P2V2 Oxygen gas, O2, filled a 5L container and had a pressure of 4 atm. If the volume was changed to 2L, calculate the new pressure in the container. 5 minutes!

  3. 4 MINUTES REMAINING…

  4. Monday, Feb. 10 Objective: Students will be able to calculate using Charles’ Law. Bell Ringer: Use Boyle’s Law: P1V1 = P2V2 Oxygen gas, O2, filled a 5L container and had a pressure of 4 atm. If the volume was changed to 2L, calculate the new pressure in the container. 4 minutes!

  5. 3 MINUTES REMAINING…

  6. Monday, Feb. 10 Objective: Students will be able to calculate using Charles’ Law. Bell Ringer: Use Boyle’s Law: P1V1 = P2V2 Oxygen gas, O2, filled a 5L container and had a pressure of 4 atm. If the volume was changed to 2L, calculate the new pressure in the container. 3 minutes!

  7. 2 MINUTES REMAINING…

  8. Monday, Feb. 10 Objective: Students will be able to calculate using Charles’ Law. Bell Ringer: Use Boyle’s Law: P1V1 = P2V2 Oxygen gas, O2, filled a 5L container and had a pressure of 4 atm. If the volume was changed to 2L, calculate the new pressure in the container. 2 minutes!

  9. 1minute Remaining…

  10. Monday, Feb. 10 Objective: Students will be able to calculate using Charles’ Law. Bell Ringer: Use Boyle’s Law: P1V1 = P2V2 Oxygen gas, O2, filled a 5L container and had a pressure of 4 atm. If the volume was changed to 2L, calculate the new pressure in the container. 1 minute!!!

  11. 30 Seconds Remaining…

  12. Monday, Feb. 10 Objective: Students will be able to calculate using Charles’ Law. Bell Ringer: Use Boyle’s Law: P1V1 = P2V2 Oxygen gas, O2, filled a 5L container and had a pressure of 4 atm. If the volume was changed to 2L, calculate the new pressure in the container. 30 seconds!!!

  13. BELL-RINGER TIME IS UP!

  14. Feb. 10, 2014 AGENDA: 1 – Bell Ringer 2 – Review HW (Boyle’s) 3 – Demo: Boyle’s Law 4 – CN: Charles’ Law 5 – Practice Problems 6 – Demo: Charles’ Law 7 – Work Time Today’s Goal: Students will be able to calculate using Charles’ Law. Homework • Charles’ Law • Make up Week 22 Quiz by Friday.

  15. Monday, Feb. 10 Objective: Students will be able to calculate using Charles’ Law. Bell Ringer: Use Boyle’s Law: P1V1 = P2V2 Oxygen gas, O2, filled a 5L container and had a pressure of 4 atm. If the volume was changed to 2L, calculate the new pressure in the container. REVIEW

  16. Kinetic Molecular Theory and Boyle’s Law Review Homework

  17. Demonstrations of Boyle’s Law • Stay Puft Marshmallow Man in a vacuum… • http://www.youtube.com/watch?v=27yqJ9vJ5kQ • What happens to lungs when diving underwater? • Underwater demo: • http://www.youtube.com/watch?v=t8wFIMbMJvs • Lab explanation demo: • http://www.youtube.com/watch?v=hXnkJNk45Ek • Discussion: How do your lungs work?

  18. Compare Formulate Support • Topic: Charles’ Law • Date:2/10/2014 • Charles’ Law = For a given amount of gas at a constant pressure, the VOLUME of the gas is directly related to TEMPERATURE. • So if: T ↑ = V ↑ T ↓ = V ↓ T α V Constant Pressure Volume Temperature

  19. Compare Formulate Support • Topic: Charles’ Law • Date:2/10/2014 • Variables & Units: • V = Volume (mL, L) • T = Temperature (K = Kelvin)  You must convert °C to K before you calculate further! • To convert degrees Celsius to Kelvin: Temp. in K = °C + 273 • Example: What is 25°C in K temp.? Temp. in K = 25°C + 273 Temp. in K = 298 K

  20. Notice subscripts are different oneach side! Compare Formulate Support • Topic: Charles’ Law • Date:2/10/2014 • Equation: V1 = V2 T1 T2 V1T2 = V2T1

  21. Practice Problem A balloon is at RT (25°C). The volume of the balloon is 2.0L. The balloon is then taken outside to a temperature of -5°C. What is the new volume of the balloon? 1st Predict: If T ↓, then V↓. 2nd Determine Variables: V1 = T1 = V2 = T2 = 3rd Calculate: V1T2 = V2T1 (2)(268)=(V2)(298) 536 = V2(298) 298 298 V2 = 536/298 V2 = 1.8L 2.0L 25°C +273=298K ? = x +273=268K -5°C Convert to K!

  22. Demonstrations of Charles’ Law • Balloon fun with liquid nitrogen… • http://www.youtube.com/watch?v=ZgTTUuJZAFs • Balloon fun with boiling water… • http://www.youtube.com/watch?v=GcCmalmLTiU • Discussion: How do hot air balloons work?

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