The photos below illustrate an experiment you can do yourself. Place 10 mL of water in an empty soda can, and heat the water to boiling. Using tongs or pliers, turn the can over in a pan of cold water, making sure the opening in the can is below the water level in the pan.

(a) Describe what happens, and explain it in terms of the subject of this chapter.
(b) Prepare a molecular level sketch of the situation inside the can before heating and after heating (but prior to inverting the can).

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(a) (b) SURGE 1402 Photos: Cengage Learning/Charles D. Winters