1. What is a Gas? Agenda January 14 Do Now (10 mins)
Dry Ice Demo (15 mins)
What is a Gas? (25 mins)
Exit Question (5 mins)

2. Do Now
Do Now: Using the diagram below, in your group attempt to solve for one box in the # of molecules row on your Stoichiometry Activity. We will discuss these problems as a class.
Molecules
known
Moles
given
Moles
unknown
Molecules
unknown
Mole-mole
3-step
Conversion
Divide by A’s
Number
Multiply by A’s
Number

3. Dry Ice Demo!
As a class we will be going into the quad for our Demo today.
Stay together as a class.
You MUST be quiet through the halls. Any student who raises
their voice above a whisper will be held back in another classroom.
In the quad all classroom rules apply. Students who do not follow
all rules will be sent back into the school.
Once the demo is complete we will re-enter the class in the same
way.

4. What is a gas? A gas is a substance that Uniformly fills a container
Mixes completely with other gases
Is easily compressed

5. The KINETIC MOLECULAR THEORY!
1. Gases consist of tiny particles (molecules or atoms)
2. The particles are TINY compared to the space between them. Therefore, the volume of the individual particles is negligible (can be considered ZERO).
Space between = BIG
Itty-bity
Itty-bitty

6. KMT continued
3. The particles are in constant RANDOM motion. The particles collide with the walls of the container. These collisions result in pressure.
Exerts pressure

7. Gases vs. Solids vs. Liquids
Solids are tightly and individual molecules cannot
Move around.
Liquids are less tightly packed and can move around a little more.
Gases have a large distance between them and therefore can move
Around and bump into each other. Gases move in a random motion!

8. Exit Question
Put these in order…from most closely packed molecules (closest
Together) to Least closely packed molecules (furthest apart).
Water, A Big Fart, Wood
In you own words explain Random Motion