1 States of matter and energy

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States of matter : 

States of matter There are 5, you’ll learn about 3

The big three : 

The big three Solids Liquids Gases

Solids : 

Solids Solids have a definite shape and a definite volume. The particles in a solid tend to be packed together in a fixed arrangement (the neighboring atoms don’t change).

Liquids : 

Liquids Liquids have do not have definite shape but they do have a definite volume. The particles in a liquid are packed together but not in a fixed arrangement (the neighboring atoms change)

Gases : 

Gases Gases do not have a definite shape or a definite volume The particles in a gas are spread out even through the vessel the contains them. They are free to expand and contract. Gases are about 1000 time less dense they would be as a solid or liquid.

Time to get up and model this stuff : 

Time to get up and model this stuff Clear all the tables and chairs to the side of the room. Once that’s done, meet in the center of the room.

Phase change : 

Phase change Changing from one state to another is a physical process. When ice melts, it’s still H2O. Now it’s just H2O liquid. We’re now going to look at the role of energy in these processes

Let’s look at energy : 

Let’s look at energy

Endothermic and Exothermic : 

Endothermic and Exothermic Endothermic – the process requires or consumes energy Exothermic – the process releases or generates energy Let’s look a the diagram again

Endo vs. Exo : 

Endo vs. Exo

Slide 11: 

Let's see all of these processes