Okay, Everyone knows that when air is heated it rises and cool air comes in to take it's place. now when you light a candle, the air above it gets heated and should rise. Then cool air should come in to take it's place right. now two things should happen. The candle should be cooled by the cool air coming in and go off and when you go near the candle you should feel cool and NOT hot right? But by common sense you can see that this doesn't happen. Why?
Answers (3)
When air is heated the molecules expand and because the density is lowered, it goes up and denser air (cool air) fill the place. When the fresh air is getting near it gets heated up and the oxygen present in the air helps the burning. During burning oxygen mix with the carbon in the candle and become carbon di oxide. Now in the phenomena continuously oxygen is supplied, while the CO2 goes up. Thus the flame continue to exist