Question: what state of matter is fire

Leigh Kesler answered on 5 Mar 2019:

Fire is a mixture of several things. The fuel that is burning could be a solid (wood), liquid (ethanol), or gas (propane). This fuel undergoes combustion with oxygen in the air (a gas). The result of the chemical reaction is a lot of energy, which heats up the air (gas). When the air atoms and molecules are given more energy, the electrons can be excited. When the excited electrons de-excite, they produce light (that’s what we see as the flame). If the fire is VERY hot, the electrons can be removed entirely from the atoms and create the fourth state of matter, a plasma. This doesn’t really happen in normal fire (like a candle) but in a really hot fire (like the Sun) is all plasma.