Feb. 11, 2014 AGENDA: 1 – Bell Ringer 2 – Review HW (Charles’) 3 – CN: Lussac’s Law 4 – Practice Problems 5 – Demos: Gas Laws  Boyle’s Law  Charles’

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Presentation transcript:

Feb. 11, 2014 AGENDA: 1 – Bell Ringer 2 – Review HW (Charles’) 3 – CN: Lussac’s Law 4 – Practice Problems 5 – Demos: Gas Laws  Boyle’s Law  Charles’ Law  Lussac’s Law 6 – Work Time Today’s Goal: Students will be able to calculate using Lussac’s Law. Homework 1. Lussac’s Law and Mixed Practice HW 2. Make up Week 22 Quiz by Friday.

Tuesday, Feb. 11 Objective: Students will be able to calculate using Lussac’s Law. Bell Ringer: Use Charles’ Law: T 2 V 1 = T 1 V 2 Oxygen gas, O 2, filled a 5L container and had a temperature of 20 °C. If the volume was changed to 8L, calculate the new temperature in the container. 5 minutes!

4 MINUTES REMAINING…

Tuesday, Feb. 11 Objective: Students will be able to calculate using Lussac’s Law. Bell Ringer: Use Charles’ Law: T 2 V 1 = T 1 V 2 Oxygen gas, O 2, filled a 5L container and had a temperature of 20 °C. If the volume was changed to 8L, calculate the new temperature in the container. 4 minutes!

3 MINUTES REMAINING…

Tuesday, Feb. 11 Objective: Students will be able to calculate using Lussac’s Law. Bell Ringer: Use Charles’ Law: T 2 V 1 = T 1 V 2 Oxygen gas, O 2, filled a 5L container and had a temperature of 20 °C. If the volume was changed to 8L, calculate the new temperature in the container. 3 minutes!

2 MINUTES REMAINING…

Tuesday, Feb. 11 Objective: Students will be able to calculate using Lussac’s Law. Bell Ringer: Use Charles’ Law: T 2 V 1 = T 1 V 2 Oxygen gas, O 2, filled a 5L container and had a temperature of 20 °C. If the volume was changed to 8L, calculate the new temperature in the container. 2 minutes!

1minute Remaining…

Tuesday, Feb. 11 Objective: Students will be able to calculate using Lussac’s Law. Bell Ringer: Use Charles’ Law: T 2 V 1 = T 1 V 2 Oxygen gas, O 2, filled a 5L container and had a temperature of 20 °C. If the volume was changed to 8L, calculate the new temperature in the container. 1 minute!!!

30 Seconds Remaining…

Tuesday, Feb. 11 Objective: Students will be able to calculate using Lussac’s Law. Bell Ringer: Use Charles’ Law: T 2 V 1 = T 1 V 2 Oxygen gas, O 2, filled a 5L container and had a temperature of 20 °C. If the volume was changed to 8L, calculate the new temperature in the container. 30 seconds!!!

BELL- RINGER TIME IS UP!

Feb. 11, 2014 AGENDA: 1 – Bell Ringer 2 – Review HW (Charles’) 3 – CN: Lussac’s Law 4 – Practice Problems 5 – Demos: Gas Laws  Boyle’s Law  Charles’ Law  Lussac’s Law 6 – Work Time Today’s Goal: Students will be able to calculate using Lussac’s Law. Homework 1. Lussac’s Law and Mixed Practice HW 2. Make up Week 22 Quiz by Friday.

Tuesday, Feb. 11 Objective: Students will be able to calculate using Lussac’s Law. Bell Ringer: Use Charles’ Law: T 2 V 1 = T 1 V 2 Oxygen gas, O 2, filled a 5L container and had a temperature of 20 °C. If the volume was changed to 8L, calculate the new temperature in the container. REVIEW

REVIEW HOMEWORK Charles’ Law

 Topic: Lussac’s Law  Date: 2/11/2014  Lussac’s Law = For a given amount of gas at a constant volume, the PRESSURE of the gas is directly related to TEMPERATURE.  So if: T ↑ = P ↑ T ↓ = P ↓ T α P 1.Contrast 2.Describe 3.Explain Temperature Constant Volume Pressure

 Topic: Lussac’s Law  Date: 2/11/2014  Variables & Units:  T = Temperature (K = Kelvin)  Remember to convert: K = ° C  P = Pressure (atm)  Equation: 1.Contrast 2.Describe 3.Explain P 1 = P 2 T 1 T 2 P 1 T 2 = P 2 T 1 Notice subscripts are different on each side! Notice subscripts are different on each side!

Practice Problem A refrigerated bottle of pop is at 4 ° C. The pressure of the bottle is 1atm. The bottle is then taken to the beach on a hot summer day, where it is 37 ° C. What is the new pressure of the bottle? 3 rd Calculate: P 1 T 2 = P 2 T 1 (1)(310)=(P 2 )(277) 310 = P 2 (277) P 2 = 310/277 P 2 = 1.12atm 2 nd Determine Variables: P 1 = T 1 = P 2 = T 2 = 1 st Predict: If T ↑, then P ↑. 4°C4°C 1atm 37 ° C ? = x +273=277K +273=310K Convert to K!

Mixed Practice Problems  Describe when to use each of the three Gas Laws (i.e., what variables are changing when you use each)…  …Boyle’s Law?  With changes in P & V  …Charles’ Law?  With changes in T & V  …Lussac’s Law?  With changes in P & T

Demonstrations of Boyle’s Law  Stay Puft Marshmallow Man in a vacuum…   What happens to lungs when diving underwater?  Underwater demo:  Lab explanation demo:  Discussion: How do your lungs work?

Demonstrations of Charles’ Law  Balloon fun with liquid nitrogen…   Balloon fun with boiling water…   Discussion: How do hot air balloons work?

Demonstrations of Lussac’s Law  How to get an egg into a bottle…   Bill Nye: Bottle and Can Crusher (Really, this addresses all of the Gas Laws.)   Discussion:  What happens to tire pressure in winter?  Aerosol cans warn: “Don’t expose to heat”… Why?