Topic 2 - States Of Matter Flashcards
What are the 3 states of matter?
Solid
Liquid
Gas
What are the 3 features of a solid?
• Particles are regularly arranged
• Particles can only vibrate about a fixed position
• Particles are close together
What are the 3 features of a liquid?
• Particles can move around each other
• Particles are randomly arranged
• Particles are close together
What are the 3 features of a gas?
• Particles can move quickly in all directions
• Particles are randomly arranged
• Particles are far apart
What’s the state change from a solid to a liquid?
Melting
What’s the state change from a liquid to a gas?
Boiling
What’s the state change from a gas to a liquid?
Condensing
What’s the state change from a liquid to a solid?
Freezing
What’s the state change from a solid to a gas?
Sublimation
What’s the state change from a gas to a solid?
Deposition
What is happening to the energy from a solid to a gas?
It’s increasing
What is happening to the energy from a gas to a solid?
It’s decreasing.
What are the key things to remember about melting and boiling point?
Boiling point = condensing point
Melting point = freezing point
Explain a heating and cooling curve?
When a solid is heated, particles gain energy but this is needed to overcome the bonds/forces holding the particles together, so the temperature remains constant. Once all the forces have been broken, the temperature will increase again.
How can you tell if a substance is pure?
It’s melting and boiling point is a specific fixed temperature.
How can you tell if a substance is a mixture?
It melts over a range of temperatures.