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Vapor Pressure and Boiling Point

Vapor Pressure and Boiling Point
Vapor Pressure and Boiling Point
Vapor Pressure and Boiling Point
Vapor Pressure and Boiling Point
Vapor Pressure and Boiling Point
Vapor Pressure and Boiling Point
Vapor Pressure and Boiling Point
Vapor Pressure and Boiling Point
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This animated PowerPoint hits several related topics.

Firstly, vapor pressure is defined qualitatively, and nonpolar molecules are identified as having a higher vapor pressure than polar molecules. At this point in the lesson, I do a demonstration that I set up a week in advance (1 day is fine, though). I get a large, empty water cooler drum and pour in a half a bottle of the highest percent by volume isopropyl alcohol I can find. Then I cap the drum with Saran Wrap and a rubber band and let build up pressure. After the students learn about nonpolar molecules having high vapor pressure, I demonstrate this property by uncapping the drum and producing a fireball by holding a burning splint to the mouth of the uncapped drum.

Phew! After the fireball...

Students learn to use the NYS Reference Table H (Vapor Pressure) to predict vapor pressures of several substances and to predict their boiling points.

Boiling is defined in the lesson as the point where vapor pressure equals atmospheric pressure. Some cool animations demonstrate that boiling is simply a spontaneous vaporization of a collection of liquid state molecules at any point in a liquid.

Some challenge questions finish up the lesson.

Most of my chemistry lessons are 8 slide PowerPoints. I print the PowerPoints each day (4 slides per page... front and back = 1 sheet of paper per student). The students then fill out the answers to my guided and scaffolded questions as I fill them out on the SmartBoard. My teaching style is highly interactive, and my lessons support that style.

All lessons include a Do Now, Mini Lesson, Pair Up, and Summary to keep students moving and engaged.

To remove the "Wickline" watermark, select the Watermark from the Insert menu, then select No Watermark. You cannot remove the watermark's from .pdf files and SmartBoard files, so you'll have to make new ones from your fresh watermark-less Microsoft file.


Science Education by Joshua Wickline is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 United States License.
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Answer Key
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Teaching Duration
45 minutes
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