Coal, methane and hydrogen are burned as fuels.
Which descriptions of this process are correct?
1 )
what happens to the fuel: oxidised / type of reaction: endothermic
what happens to the fuel: oxidised / type of reaction: exothermic
3 )
what happens to the fuel: reduced / type of reaction: endothermic
4 )
what happens to the fuel: reduced / type of reaction: exothermic
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