My group and I filled the soda can with approximately 15mL of water. I carefully placed the container on the Type 15500 Hot Plate and in a couple minutes we saw a cloud of condensed water vapor. We counted to thirty, then I took the prongs and turned the hot can upside-down into the bucket filled with ice cold water. Instantaneously, the can collapsed. Why did this happen? Air was forced out of the can when it started to steam. Then it was full of water vapor. Next, my group and I created low air pressure inside the container when we inverted it into the ice cold water. Thus, the can collapsed because the air pressure outside of it was stronger than the air pressure within it.
Information from http://scifun.chem.wisc.edu/HomeExpts/COLLAPSE.html
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