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Feb. 11, 2014
AGENDA:1 – Bell Ringer2 – Review HW
(Charles’)3 – CN: Lussac’s Law4 – Practice
Problems5 – 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.
Homework1. Lussac’s Law and
Mixed Practice HW2. 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: T2V1 = T1V2 Oxygen gas, O2, 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: T2V1 = T1V2 Oxygen gas, O2, 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: T2V1 = T1V2 Oxygen gas, O2, 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: T2V1 = T1V2 Oxygen gas, O2, 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: T2V1 = T1V2 Oxygen gas, O2, 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: T2V1 = T1V2 Oxygen gas, O2, 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 Ringer2 – Review HW
(Charles’)3 – CN: Lussac’s Law4 – Practice
Problems5 – 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.
Homework1. Lussac’s Law and
Mixed Practice HW2. 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: T2V1 = T1V2 Oxygen gas, O2, 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 HOMEWORKCharles’ 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. Contrast2. Describe3. Explain
Temperature
ConstantVolu
me
Pressure
Temper-ature
Pre
ssu
re
Topic: Lussac’s Law Date: 2/11/2014
Variables & Units: T = Temperature (K = Kelvin)
Remember to convert: K = °C + 273
P = Pressure (atm) Equation:
1. Contrast2. Describe3. Explain
P1 = P2
T1 T2 P1T2 = P2T1
Notice subscriptsare 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?
3rd Calculate:P1T2 = P2T1
(1)(310)=(P2)(277)
310 = P2(277) 277 277P2 = 310/277P2 = 1.12atm
2nd Determine Variables:P1 =T1 =P2 =T2 =
1st Predict: If T ↑, then P ↑.
4°C1atm
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… 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 yourlungs work?
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=GcCmalm
LTiU
Discussion: How do hot air balloons work?
Demonstrations of Lussac’s Law
How to get an egg into a bottle… http://www.youtube.com/watch?v=N133Ya9
iEBY Bill Nye: Bottle and Can Crusher (Really,
this addresses all of the Gas Laws.) http://www.youtube.com/watch?v=NOSNS3IvR_M
Discussion: What happens to tire pressure in winter? Aerosol cans warn: “Don’t expose to
heat”… Why?
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