13 / 06 Tuesday Kaupapa: Describe the properties of solids, liquids and gases using particle diagrams

Do you remember? Describe the evidence that supports the particle theory

Solid Liquid Gas

Particles in a solid – animation

Solid Liquid Gas Particles hold each other strongly. They are only a little active. Particles hold each other very weakly. They are somewhat active. Particles are far apart from each other. They are very active.

How can we change the physical state? Question: How can we change the physical state?

Evaporation Melting Freezing Condensation Sublimation Deposition

Solid Liquid Melting Freezing The particles are separated out The particles are brought closer together

Water / Ice Chocolate 35 Wax 50 Lead 327 Gold 1060 Diamond 3550 Substance Melting Point (oC) Water / Ice Chocolate 35 Wax 50 Lead 327 Gold 1060 Diamond 3550 Mercury -39 Gallium 30

Gallium

Liquid Gas Evaporation Condensation The particles are completely separated out Condensation Gas The particles are brought closer together

Evaporation

Condensation

Evaporation and Condensation Practical: Evaporation and Condensation

How else can we change the state? Extension Question: How else can we change the state?

Liquefied Gas!

Liquid Nitrogen

“Oobleck” – solid or liquid?

What have we learnt today? Describe the particles in solid/liquid/gas

Which process is this?

Which process is this?

Which process is this?