We have not talked about heats of combustion of compounds other than hydrocarbons. Nevertheless, from among the

Question:

We have not talked about heats of combustion of compounds other than hydrocarbons. Nevertheless, from among the compounds shown here, you should be able to deduce which one gives off the most heat on combustion (to give CO2 and H2O) and which one the least.
CH3CH2OH HOCH2CH2OH HOC – COH