Topic 3 Particle Motion In Gases Flashcards
Describe the movement of gas particles
Constantly moving in random directions at random speeds
What happens if you increase the temperature of the gas
The particles gain more kinetic energy
As you increase the temperature of the gas
The average speed of particles increases
What happens as gas particles move about at high speeds
They bang into each other and whatever else happens to get in the way
What happens when they collide with something
They exert a force and so pressure onto it
In a sealed container what is the outward gas pressure
The total force exerted by all the particles in the gas on a unit area of the container walls
Faster particles and more frequent collisions both lead to an increase in what
Net force and so increase gas pressure
Increase in the temperature will increase what
The speed of the gas particles and so the pressure ( if the volume is kept constant)
If a gas temperature is constant increasing the volume of a gas the particles will what
Be more spread out and hit the walls of the container less often
so the gas pressure decreases
Pressure and volume are what
Inversely proportional
when volume goes up pressure goes down
For a gas oven fixed mass at a constant temperature the relationship is
Pressure x volume = constant
The pressure of a gas causes net outward forces at what
At right angles to the surface of its container
Why are there also forces on the outside of a container
Due to the pressure of the gas around it
If a container can easily change in size then any change in pressure as will cause what
The container to compress or expand due to the overall force
If a helium balloons released atmospheric pressure decrease with height so what happens
 so the pressure Outside the balloon decreases causing the balloon to expand until the pressure inside drops of the same as the atmospheric pressure is
