Particle theory Flashcards
Do the particles in a substance stay the same?
Particle in a substance stay the same whether its a solid liquid or gas, however what changes is the arrangement.
How do solid particles look like?
Solid particles are very close and are held tightly together. The particles are always in a straight line. Unlike gases and liquids the particles in a solid dont move around they just vibrate because of how close they are. Solids have strong forces of attraction.
How do liquid particles look like?
Liquid particles are close together, but they are free to pass each other unlike solid particles. Liquid particles move around in all directions. Liquid particles are not like solid particles they dont stay in a straight line. Liquids have weak forces of attraction.
How do gas particles look like?
Gas particles are far apart from each other. They are free to move around in all directions. Gas particles move around very quickly. Gases have very weak forces of attraction.
What happens to the particles of gas when you move them to a bigger container?
The gas particles spread around and fill up the space.
Why do liquids flow but solids dont.
Liquids flow because they have space to move around in all directions, however solids a very close together so they are not able to move.
Why can gases be easily compressed but liquids cant?
Gases are less dense and so they can be pushed closer together, but liquids are already close t each other.
Why are solids more dense the gases?
Solids are more dense because the particles are very close to each other to the point they dont move around they just vibrate, although gases have so much space to move around in.
Why do liquids keep the same volume but gases dont?
Liquids dont have a definite shape but whichever container you put liquid in it will stay the same volume because they stay close, however gases are spread out all over the place so they dont have a definite volume or shape.
What is it called when gas particles bounce of a container?
This is called gas pressure. The amount of gas pressure depends on temperature and space.
How does temperature affect the gas pressure?
When the temperature increases it transfers energy to the gas particle which makes the particle move faster and hit the walls harder and faster.
How does volume affect the gas pressure?
Once the volume decreases it makes the pressure increase because the particles get squashed and hit the walls more often.
What does diffusion mean?
Diffusion is just when particles start to spread out. Particles move from a high concentration to a low concentration. This means that when there is a more particles on one side than the other it is called high concentration, so the side with less particle has a low concentration.
What are 2 ways to increase gas pressure?
One way is to increase the temperature. Another is to reduce the volume.
Why does spraying perfume on warm parts of your body help the particles to diffuse faster?
When sprayed on warm parts of the body the particles will diffuse faster because the heat will transfer energy to the particles, so the particles will move around faster.
