Chemistry- Matter Flashcards
What would a model of gas look like?
The particles would be widely spaced, this explains why it is easy to compress a gas and why the density of a gas is usually low.
What would a model of solid particles look like?
When particles touch their neighbours it’s a solid. This explains why you can’t compress a solid. The particles do not move around when a substance is solid, instead it vibrates.
What would a model of liquid particles look like?
When a substance is in the liquid state, the particles are in contact with each other, this explains why you can’t compress a liquid. They are not closely packed like a solid. The particles move randomly from place to place, this explains why liquids flow and why they have no fixed shape.
What is sublimation?
Where something changes from solid to gas.
What happens in condensing?
Substances change from the gas to liquid state.
What happens in evaporation?
Particles leave from the surface of the liquid
Complete the gaps.
The more particles in the container the ____
the pressure.
The ______ the temperature the higher the pressure.
- Higher
2. Higher
Finish the gaps.
When a substance changes state, it’s _____Dont change. All that changes is the ____ between them
- Particles
2. Distance
What is a mixture made up of?
It’s made up of different substances that are not joint together.
What does a pure substance have?
It has no other substances mixed with it because it’s PURE.
What’s Brownian motion?
Brownian motion is the random, uncontrolled movement of particles in a fluid as they constantly collide with other molecules
What is the solute?
The substance that dissolves to make a solution.
What’s a solvent?
A liquid that substances can dissolve in.
What’s diffusion?
The movement of a substance from an area of high concentration to an area of low concentration. Diffusion occurs in liquids and gases when their particles collide randomly and spread out.
What’s dissolving?
To be broken up and absorbed
