What is the coldest fire?
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By definition: Temperature is the measure of heat ENERGY. The lower the tempurature - the less heat energy. Liquid Hydrogen and oxigen released at a controlled rate at its evaporation point will burn the coldest flame because of it being so cold to begin with. Also, because of of the minimal energy output you will not see any light, so that is your coldest color - no light. Light and heat are both energy and the least energy is the absence of energy. The flame from the space shuttle (not the boosters) is a very thin light blue, but that is at an extreme rate of burn, not the whisper of flame that I am talking about in a dark and very cold room. Also, you have your spectrum backwords - Red light is hotter than blue - There is more energy in red light (The sun feels hot). On objects - black absorbs energy and white reflects it, but clear glass lets it pass thru - so once again - no color is the coolest. I hope this doesn't throw a monkey wrench into this discussion.:suss:
Good explanation. I've always known that the process of burning was the same for hot and cold. But the question that comes up now, since liquid hydrogen and oxygen are freezing temperatures and fire is extremely hot, is there a continuous line between those two temperatures for burning. Otherwise, my original question is still valid. What is the coldest fire and add to it what is the hottest evaporation rate for liquid gases?
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