Chapter 14 - The Behavior of Gases Flashcards
List three factors that can affect has pressure.
Temperature, volume, and the amount of gas.
Why is a gas easy to compress?
Because of the space between particles of gas.
Why does a collision what an air bag cause less damage than a collision with a steering wheel?
When a person collides with an air bag, the impact forces the gas molecules close together which prompts it to absorb the energy of the impact
How does a decrease in temperature affect the pressure of a contained gas?
Temperature and pressure are directly proportional. A decrease it temperature equals a decrease in pressure as well.
Explain why a gas can be easily squeezed into smaller volume.
A gas can be squeezed into smaller volume because the particles are much farther apart. No attractive or repulsive forces exist between them.
How are the pressure and volume of a gas related at constant temperature?
They are inversely proportional, meaning that if the one goes up, the other goes down and vise versa.
If pressure is constant, how does a change in temperature affect the volume of a gas?
Temperature and volume are directly proportional, meaning if temperature increases, volume would increase as well.
What is the relationship between the temperature and pressure of a contained gas at constant volume?
Temperature and pressure are directly proportional.
In what situations is the combined gas law useful?
When only the amount of gas in constant.
Practice #22 pg. 463
Okay.
The volume of a balloon increases as it rises in the atmosphere. Why doesn’t the drop in temperature at higher altitudes cause the volume to decrease?
As the balloon rises in altitude, the atmospheric pressure decrease which causes the volume to increase.
Practice #26 & #27 pg. 465 on ideal gas law.
Okay
Under what conditions do real gases differ most from ideal behavior?
Low temperature and high pressure
What’s the difference between an ideal gas and a real gas?
Ideal gas: particles with no volume - no attraction between particles.
Real gas: particles have volume - there are attraction between the particles (because of this a gas can condense or solidify)
In a mixture of gases, how is the total pressure determined?
By adding up the partial pressure of the component gases.
