1. Properties of matter – 1.2 Boiling point of water (teacher instructions)
Text
Experimentation instructions:
Background information on the content and practical information on conducting the “Boiling point of water" experiment.
Englisch
24.10.2022
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The students should be aware of everyday examples in which liquid substances are transformed into gaseous substances (e.g., perfume, gasoline, or water). Use the method of “question for discussion” and ask the students why we should not keep perfume or gasoline in an open container.
Also work out the difference between the evaporation and the boiling of a liquid. If the particle model is known, students should understand that evaporation takes a long time because there is not enough energy for all the particles. At the boiling point, enough energy is supplied to the liquid so that the transition to the gaseous state can proceed spontaneously.
One item deals with „Technical application and vocational orientation“.
Also work out the difference between the evaporation and the boiling of a liquid. If the particle model is known, students should understand that evaporation takes a long time because there is not enough energy for all the particles. At the boiling point, enough energy is supplied to the liquid so that the transition to the gaseous state can proceed spontaneously.
One item deals with „Technical application and vocational orientation“.
Experiment
Chemistry; Physics; Technology
Grade 7 to 9; Grade 10 to 13
Middle/high school; Vocational training
State of aggregation; Temperature (general); Water
Siemens Stiftung Media Portal
Dieter Arnold
© Siemens Stiftung 2022
