Mar
06
2010
Hot Surface
Hot Surface
why does blowing over the surface of hot soup cool the soup?
Fyi: I’m not dumb. I wanted to know the best possible way to say it scientifically
to lol:
yeah you're right because a three year old can DEFINATELY type and all..
According to a transcript from a scientific radio show broadcast by Indiana University, it's caused by evaporation:
When you sit down to that steaming bowl of soup, the faster-moving, hotter particles "leap off the surface," evaporating and leaving the slower-moving, cooler particles behind. But these evaporated particles form a little cloud of vapor above your bowl, saturating the air and preventing any more evaporation. When you blow on your soup, you disperse the vapor cloud. This clears the air, so to speak, for more hot particles to evaporate, thus cooling the soup.
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