14 / 06 Wednesday Kaupapa: Describe the processes of changing physical states
Do you remember? Describe the particles in solid Describe the particles in liquid Describe the particles in gas
Which process is this?
Which process is this?
Which process is this?
Solid Liquid Gas
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
“Oobleck” – solid or liquid?
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
Sublimation Solid Gas Deposition
Dry Ice
Practical: Iodine Crystals
What have we learnt today? Give an example of sublimation Give an example of deposition
Which process is this?
Which process is this?
Which process is this?