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    Hot Coal & Liquid Nitrogen

    I've always wondered how people are able to walk on hot coal without suffering from burns. Moreover, earlier, a teacher demonstrated to my class how if one spills liquid nitrogen on one's hand in open air that one does not suffer from frostbite, but only feels the cold temperature. I got...
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    Mass of solid water and gaseous water?

    Homework Statement a 1kg of Water at 25 degrees celsius is in a container. A solid block of 1kg Carbon Dioxide at its sublimation temp of -80 degrees celcious is placed into the container, with the lid then closed. Final temperature of entire system = 0 degrees celcius Final phase of the...