Grab binders, calculators & handoutsBegin the Do Now

10/4 Do Now• What are the units for both temperature (most

commonly used in science) and pressure?

• What is the Standard Temperature & Pressure?

• Convert 38°C to Kelvin.• Convert 373K to °C.

• If a force of 60N is applied over an area of 3m2, what pressure is felt?

Recap- Open vs. Closed systems

- STP (Standard Temperature & Pressure)

- Gas particles exert pressure against their containers

Kinetic Molecular Theory ModelDirections: - Choose a KMT model- Open the model and move it around- Answer the following 4 questions in your notes

*M&M’s represent gas particles, DO NOT EAT!

Kinetic Molecular Theory (KMT)Directions: Answer the following questions in

your notes.1. Do the “gas particles” attract or repel one

another?2. Do the particles ever stop moving when you

are shaking the box?3. Are all of the particles moving at the same

speed? In the same direction?4. Do the particles add mass to the box

system?

KMT & P-T RelationshipKey Point #1

Key Point 1: - Kinetic Molecular Theory =

Gas particles…- do not attract or repel each

other- are in constant random motion- KE is directly related to their T- have mass

Human Gas Particle Activity:

How are the pressure and temperature of a gas related?

Key Point #2Key Point 2:

- Diffusion = random spread of particles from high to low pressure

Why is it that global warming does not solely occur over places where factories are located?

Key Point #3Key Point 3:

Pressure and Temperature=DIRECT relationship

- As 1 variable changes, the other changes in the same direction

Key Point #4Key Point 4:- Gay-Lussac’s Law =

math equation that describes relationship between P and T of a gas

P1= P2

T1 T2

Initial Final

Gay-Lussac’s Law Example 1Compute the missing value:

T1 = 322K; P1 = ?; T2 = 303K; P2 = 2.0atm

P1= P2

T1 T2

Gay-Lussac’s Law Example 2Compute the missing value:

T1 = ?; P1 =6.0atm; T2 = 546K; P2 = 10.0atm

P1= P2

T1 T2

Gay-Lussac’s Law Example 3Compute the missing value:

T1 = 364K; P1 =2.0atm; T2 = 123K; P2 =?

P1= P2

T1 T2

Gay-Lussac’s Law Example 4Compute the missing value:

T1 = 273K; P1 =5.5atm; T2 = ?; P2 = 1.0atm

P1= P2

T1 T2

Gay-Lussac’s Law Example 5A gas system has an initial temperature of 443.0K with the pressure unknown. When the temperature changes to 1390K the pressure is found to be 7.77atm. What was the initial pressure?

P1= P2

T1 T2

Gay-Lussac’s Law Example 6P1= P2

T1 T2

A gas system has initial pressure and temperature of 12.0atm and 27.9°C If the pressure changes to 3.74atm, what will the end temperature be in °C?

Relay Race Warm-Up15 minutes to complete the rest of the relay race

warm up on your own

* ALWAYS check your UNITS!

P1= P2

T1 T2

Relay Race1. Get into teams of 42. Each team gets a relay round, once Ms.

Herndon says go, flip over the round and answer the questions

3. Once finished, raise your hands and shout out “Ms. Herndon!” I will check your group’s answers. UNITS must be correct to get answer right!

Relay Race1. 6 rounds, 4 questions each

2. Round placements will be tracked. Even if your team does not get 1st place, keep going!

3. Relay Winner Prizes:1st place = 5 points added to next quiz2nd place = 3 points added to next quiz3rd place = 1 point added to next quiz

Exit Ticket #7Complete Exit Ticket 7 to the best of your

abilities on your own & without notes.