Gases Flashcards
Properties of Gases - Pressure of gases
- Exerts pressure on the walls of it’s container.
- Lots of gas particles colliding with the container each second.
- When a gas particle collides with the wall of it’s container it’s momentum changes and bounces back off the wall.
- This exerts a force on both the particle and the wall.
- The pressure exerted on the wall is equal to the force (of the ball) per unit area (of the wall being hit).
Properties of gases - temperature of gases
The higher the temp gas the higher the kinetic energy of the gas’ particles.
As you heat a gas you transfer more kinetic energy to the gas’ particles
This increases the speed of the particles
What happens when a gas particle collides with the wall of it’s container?
It’s momentum changes as it bounces back off the all.
What happens to the particles when the temperature is increased?
It’s particles get more kinetic energy and move faster.
What happens to the pressure in a fixed container when the temperature increases?
The particles will collide with the container walls with more force.
The pressure will increase.
What happens to the pressure in a stretchy container when the temperature increases?
An increase of temperature leads to kinetic energy of particles.
The particles collide with the walls of the container with more force.
If the container can expand (increase it’s volume) it will - the gas pushes it outwards.
If we increase the temperature of the gas in a balloon, the balloon will…
Expand
Why is it harder to squish a balloon as you squeeze harder?
You reduce the balloons volume and the pressure inside the balloon increases.
What happens when the force increases in a fixed container?
When the force , and the surface area doesn’t change, the pressure increases p = F/A
What does pressure x volume equal?
Pressure x volume = constant
