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This is a very vague question! How big is your candle? How long will you burn it for? Wax is a hydrocarbon, so in burning it you are breaking C-C bonds and C-H bonds, and forming new bonds in carbon dioxide and water - so you could do a calculation involving bond enthalpy data. But I don't think you meant your question that way. So.. how about this answer: 'Not much'. Things that burn with a yellow flame are not burning very effectively: the yellow flame is carbon particles that didn't get burned, glowing. If you hold a glass over your candle you will be able to collect all that as soot. Things that are burning blue are burning more efficiently and so producing more heat: they are using more oxygen too. If you have a gas boiler in yoru house it is important that the flame is blue not yellow. A yellow flame shows that your boiler is not getting enough oxygen to form carbon dioxide and will instead be producing carbon monoxide, which is poisonous. If you meant how hot is the flame, I'd guess about 600 degrees Celcius. A good roaring Bunsen flame is about 1800 degrees. anyone who knows specifically, please add to this answer!

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14y ago
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12y ago

One kg of carbon combines with oxygen to produce 3.6 kg of carbon dioxide.

One ounce of carbon when burnt emits 3.6 ounces of carbon dioxide.

So if the candle contains 100% carbon, then a 1 kg candle will release 3.6 kg of CO2. And a 1 lb candle will release 3.6 lbs of CO2.

If the contains 80% carbon, then the emissions will be 2.9 kg.

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Q: How much heat is released from a candle?
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