17 November, 2014. Kinetic Theory. Keywords Boiling point, condense, evaporate, freezing point, melt, melting point, sublimation. Learning Outcomes: All students should be able to: Describe what happens at melting/freezing and boiling point Label a general cooling curve.
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All students should be able to:
Most students should be able to:
Some students should be able to:
Explain how evaporation makes a liquid cooler
Water can be a solid, liquid or a gas
Each change of state is given a different name:
Evaporation occurs when the particles in a liquid escape to form a vapour.
Evaporation can occur at any temperature but it occurs most rapidly at a liquid’s boiling point.
The particles that escape take some energy from the remaining particles and so the temperature of the liquid falls.
Evaporation is another method of heat transfer.
AF1 – Thinking Scientifically
AF4 – Using investigative approaches
Sublimation, reverse sublimation
OR: AB document link on page 127 opens a CLOZE exercise covering the material on page 126-127. There is also an AT presentation with the answers.
Youtube video of sublimation of dry ice: