Coal can be turned into carbon dioxide that contains some of these mixed in:
water vapor, sulfur dioxide, nitrogen dioxide, carbon monoxide, and ammonia.<br>
Also, when you burn coal, you get some solid stuff called "coal ash" or "fly ash" which is somewhat like sand or dirt particles.
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Otherwise, you can bake coal in an airtight oven, and from that you get a thick oily substance called "coal tar", which can sometimes be used in medicines (in very small amounts), a complicated substance, and you also get ammonia, hydrogen sulfide, and other poisonous substances, PLUS you get a solid substance called "coke" that is made of nearly 100 percent carbon. Coke is good for making iron and steel, and in smelting some other metals, and you can use it to heat up your house if you can get it an you burn it very carefully.
it already is coal is fossilised wood
by heating the absence of air
By burning the coal. No, this is not necessarily the only way. Other ways are very important.
Millions of years of pressure and heat turned decaying animals and plants into coal.
Coal, as a form of carbon has no liquid phase it will go strait to gas in a process called sublimination at about 5800k.
coal
There is no such thing as green coal.
he turned the coal white
Coal is formed from plants, which turned into peat, then lignite, then coal.
it already is coal is fossilised wood
By burning them
by heating the absence of air
By burning the coal. No, this is not necessarily the only way. Other ways are very important.
Millions of years of pressure and heat turned decaying animals and plants into coal.
when coal burns the energy change is chemical -------------> electrical
From prehistoric plants that died and turned to coal. Sometimes in underground coal mines we find a tree stump that is coal, but can still be recognized as a tree stump.
Coal can't be turned back into coal ore once it is mined. Since there is no enchanting in Minecraft PE, there is no way to obtain coal blocks in survival.