Lesson 8

Gas Density

Water exists in many forms

• Vapor
• Fog
• Clouds
• Liquid water

Sublimation - the phase change from solid directly to gasEvaporation - phase change from liquid to gas

Molecules of a gas are 1,000 times more dispersed than solids

When you are calculating the density of a substance by using the formula for density, there is a way to check your how close you were to the actual value. This is called your percent of error.

-first find your value then subtract the accepted (or actual) valuefrom your value

-next divide that answer by the accepted value and then convert to percent and you have your percent of error

Practice Problems

1) gas is not as dense as a solid. That's why objects can pass through a gas

3) sublimation is the process of the phase change from a solid directly to a gas and evaporation is the phase change of a liquid into a gas.

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