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?