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April 30, 2013

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AGENDA:

1 – Bell Ringer & Part. Log

2 – CN: Kinetic Molecular Theory and Boyle’s Law

3 – Practice Problems

4 – Demo: Boyle’s Law

5 – Work Time

Today’s Goal:

Students will be able to explain kinetic molecular theory and Boyle’s Law.

Homework

- Kinetic Molecular Theory and Boyle’s Law
- Work from Week 32 is due by Friday.
- Make up Week 32 Quiz by Friday.

Objective:

Students will be able to explain kinetic molecular theory and Boyle’s Law.

Bell Ringer:

Describe what happens to the volume of a balloon when you apply pressure to it by squeezing it.

5 minutes!

4 MINUTES REMAINING…

Objective:

Students will be able to explain kinetic molecular theory and Boyle’s Law.

Bell Ringer:

Describe what happens to the volume of a balloon when you apply pressure to it by squeezing it.

4 minutes!

3 MINUTES REMAINING…

Objective:

Students will be able to explain kinetic molecular theory and Boyle’s Law.

Bell Ringer:

Describe what happens to the volume of a balloon when you apply pressure to it by squeezing it.

3 minutes!

2 MINUTES REMAINING…

Objective:

Students will be able to explain kinetic molecular theory and Boyle’s Law.

Bell Ringer:

Describe what happens to the volume of a balloon when you apply pressure to it by squeezing it.

2 minutes!

Objective:

Students will be able to explain kinetic molecular theory and Boyle’s Law.

Bell Ringer:

Describe what happens to the volume of a balloon when you apply pressure to it by squeezing it.

1 minutes!!!

Objective:

Students will be able to explain kinetic molecular theory and Boyle’s Law.

Bell Ringer:

Describe what happens to the volume of a balloon when you apply pressure to it by squeezing it.

30 seconds!!!

AGENDA:

1 – Bell Ringer & Part. Log

2 – CN: Kinetic Molecular Theory and Boyle’s Law

3 – Practice Problems

4 – Demo: Boyle’s Law

5 – Work Time

Today’s Goal:

Students will be able to explain kinetic molecular theory and Boyle’s Law.

Homework

- Kinetic Molecular Theory and Boyle’s Law
- Work from Week 32 is due by Friday.
- Make up Week 32 Quiz by Friday.

Objective:

Students will be able to explain kinetic molecular theory and Boyle’s Law.

Bell Ringer:

Describe what happens to the volume of a balloon when you apply pressure to it by squeezing it.

REVIEW

Contrast

Describe

Explain

- Topic: Kinetic Molecular Theory & Boyle’s LawDate: 4/30/2013
- Kinetic Molecular Theory of Gases:
(Movement of Molecules)

- Gases are easily compressed. (They can take the shape of any container.)
- Gas particles move around randomly with no pattern.
- When gas particles collide, they do not lose energy. (They bump into each other and keep on moving.)
Because of these assumptions, predictions can be made about how gases will be affected by changes in temperature, pressure, and volume.

Contrast

Describe

Explain

- Topic: Kinetic Molecular Theory & Boyle’s LawDate: 4/30/2013
- Boyle’s Law = For a given amount of gas at a constant temperature, the VOLUME of the gas is inversely related to PRESSURE.
- So if:V ↑ = P ↓
V ↓ = P ↑

V α 1/P

P α 1/V

Constant Temperature

Pressure

Volume

- Variables & Units:
- P = Pressure (atm) (atm = atmospheres)
- V = Volume (L, mL)
- T = Temperature constant

P1V1 = P2V2

A gas has an initial pressure of 5atm. The pressure was changed to 8atm and the volume became 10L. What was the starting volume of the gas?

1st Predict:

If P↑,

then V↓.

2nd Determine Variables:

P1 =

V1 =

P2 =

V2 =

3rd Calculate:

P1V1 = P2V2

(5)(V1) = (8)(10)

(5)V1 = 80

5 5

V1 = 80/5

V1 = 16L

5atm

? = x

8atm

10L

- 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

- Underwater demo:
- Discussion: How do your
lungs work?