Topic 2 - States of Matter and Mixtures (pmt)
No description yet. This curated deck is ready for daily study.
Card preview (12)
Describe the arrangement and movement of particles in solids
• Tightly packed together in a regular arrangement • Vibrate in fixed positions
Describe the arrangement and movement of particles in liquids
• Close together but able to move past each other. • Vibrate and move around each other
Describe the arrangement and movement of particles in gases
• Well separated with no regular arrangement • Vibrate and move freely at high speeds
Compare the relative energies of particles in solids, liquids and gases
Particles in a solid have the least amount of energy and particles in a gas have the most energy
What does ‘interconversion of state’ mean?
When matter changes from one state to another due to changes in temperature or pressure
What are names for the state changes for solid and liquid
• Solid to Liquid is Melting • Liquid to Solid is Freezing
What are the names for the state changes for liquid and gas
• Liquid to gas is evaporation • Gas to liquid is condensation
Forces between particles in solids, liquids and gases
Solids - strong forces of attraction between particles which keeps them in their fixed positions Liquids - weaker attractive forces than in solids Gases - Weakest intermolecular forces so particles are in random movement
How does a physical change differ from a chemical change
• A physical change involves changes in the forces between particles. The particles themselves remain the same and the chemical properties remain the same. • A chemical change is different as it affects the chemical properties of the substance
How easy to reverse are physical changes
Relatively easy to reverse since no new product is formed during the changes of state.
Solid to gas
Sublimation