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G1.3 A QUESTION
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Earlier, when we explained boiling, we said that the particles needed to be energetic enough to overcome the particles’ hold on each other.

As the water evaporated in the video, the temperature of the water in the dish stayed at room temperature (20ºC). This is much lower than the boiling point of water, so how do the particles get enough energy to escape?

 


















To understand evaporation we need to look more closely at the temperature of a sample and the energies of individual particles.


Notes: see Teachers’ Guide
 
teachers’ guide g1



more info
g1: evaporation
g2: energy
g3: explaining
g4: boiling
g5: comparing rates

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