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Does blowing on our hot food before we put it into our mouths actually make a difference to how hot it is? (self.nostupidquestions)

submitted 7 months ago by Oneeightnine to c/nostupidquestions@lemmy.ca

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I'm thinking that no, it doesn't. Which begs the question of why we do it? Is it a psychological thing?

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[–] amio@kbin.social 13 points 7 months ago

It does. Heat conduction is faster when the temperature difference is large. Air soaks up a lot of heat, so still air is a poor heat conductor. If you're blowing it around, you're increasing the amount of fresh, colder air that can interact with the food.

One spoonful and a couple of breaths is small enough stuff to have a relatively small effect and a lot of error margin, though.