Question

the complete combustion of methanol is as follows:
2ch₃oh(l) + 3o₂(g) → 2co₂(g) + 4h₂o(l)
which of the following statements is true regarding the reaction?
select the correct answer below:
combustion of methanol is only possible because of the -oh group
it is an exothermic reaction.
it is an endothermic reaction.
none of the above.

Explanation:

Combustion reactions, like the one shown for methanol, release heat. Exothermic reactions are those that release energy (heat) to the surroundings. Methanol combustion is a common example of an exothermic process. The presence of the -OH group is not the sole reason for combustion (hydrocarbons without -OH also combust). Endothermic reactions absorb heat, which is not the case here. So, the correct statement is that it is an exothermic reaction.

Answer:

B. It is an exothermic reaction.