Chapter 13 “The Behavior of Gases”

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The Properties of Gases

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Presentation transcript:

Chapter 13 “The Behavior of Gases”

Chemistry Joke Oops! I spilled water on my homework.

Kinetic Molecular Theory Gases are hard, spherical particles that: Have insignificant volume. Are not attracted to or repelled by each other. Move randomly in straight paths. Experience elastic collisions with complete transfer of kinetic energy

Variables that Describe a Gas The four variables and their common units: 1. pressure (P) in kilopascals - kPa 2. volume (V) in Liters - L 3. temperature (T) in Kelvin - K 4. amount (n) in moles - mol How are each of these variables related to each other?

Boyle’s Law Pressure goes up, volume goes down; Pressure goes down, volume goes up Equation: P1V1 = P2V2

Graph of Boyle’s Law

Charles’s Law The volume of a fixed mass of gas is directly proportional to the Kelvin temperature, when pressure is held constant.

The Combined Gas Law The combined gas law expresses the relationship between pressure, volume and temperature of a fixed amount of gas.

Chemistry Joke “Due to budget cuts, science and health will both taught by the chemistry teacher… Oops!