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Gas Behavior

Chapter 3 Section 3 Physical Science

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.
Created by: Tom Radeke