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# April 30, 2013 - PowerPoint PPT Presentation

April 30, 2013. 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

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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

Describe

Explain

• Topic: Kinetic Molecular Theory & Boyle’s Law Date: 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.

Describe

Explain

• Topic: Kinetic Molecular Theory & Boyle’s Law Date: 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

Topic: Kinetic Molecular Theory & Boyle’s LawDate: 4/30/2013

• Variables & Units:

• P = Pressure (atm) (atm = atmospheres)

• V = Volume (L, mL)

• T = Temperature  constant

• Equation:

• 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…

• What happens to lungs when diving underwater?

• Underwater demo: