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Gas Behavior
Chapter 3 Section 3 Physical Science
Question | Answer |
---|---|
Pressure | the force exerted on a surface divided by the total area over which the force is exerted |
Boyle's Law | When the pressure is increased, the volume decreases. When the pressure is decreased, the volume increases. |
Charles's Law | When the temperature is increased, the volume increases. When the temperature is decreased, the volume decreases. |
What units are used to measure pressure? | Pascals (Pa) or kilopascals (kPa) |
What could cause a helium balloon to burst as it rises in the atmosphere? | Decreasing outside pressure causes the helium inside the balloon to expand. |
What factor is kept unchanged when demonstrating Charles's law? | Pressure is unchanged. |
How is gas pressure defined? | The force of its outward push divided by the area of the walls of its container. |
Describe how the motions of gas particles are related to the pressure exerted by the gas. | As the moving gas particles collide with the walls of their container, they push on the container walls. |
Why does pumping more air into a basketball increase the pressure inside the ball? | The greater number of gas particles inside the basketball results in more collisions, which increase the outward push of the gas. |
How does Boyle's law describe the relationship between gas pressure and volume? | At constant temperature, when gas pressure increases, gas volume decreases. |
Explain why increasing the temperature of a gas in a closed, rigid container causes the pressure in the container to increase. | When the temperature increases, gas particles move faster and collide more frequently with greater force. |