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Quick Science Sift #8:rapid vaporization of cryogenic liquid

submitted by gluonium

1 decade 7 years 6 months 1 week ago

When a coffeemaker-full of hot water meets a bucket of liquid nitrogen the rapid vaporization of the liquid creates quite an eruption. The gas occupies ~700 times the volume of the liquid. This is not an experiment I would recommend unless you REALLY know what you are doing. Liquid nitrogen has a low heat capacity so the hot water you pour in is going to blast right back out at nearly the same scalding hot temperature. In addition, you are vaporizing a LARGE amount of pure nitrogen here, asphyxiation risks in closed environments are real and do kill people!