Final answer:
The chemical reaction given is exothermic, as it likely releases energy into the surroundings, characteristic of combustion reactions.
Step-by-step explanation:
The reaction 2CH₃OH(l) + 3O₂(g) → 4H₂O(l) + 2Co₂(g) is exothermic. In an exothermic reaction, energy is released into the surroundings, and the enthalpy change (ΔH) is negative. This can be deduced from the general knowledge that combustion reactions, such as the burning of methanol (CH₃OH), typically release heat.
Hence, The chemical reaction given is exothermic, as it likely releases energy into the surroundings, characteristic of combustion reactions.