Ethanol as a fuel questions (1 Viewer)

[Kingportable]

Hi i am struggling with this one,

One way of minimising the greenhouse effect is to minimise the amount of carbon dioxide formed per kilojoule of energy produced. Arrange the following fuels in order of increasing amount of carbon dioxide per kilojoule of energy released. For each substance the amount of energy released in kj per mole during combustion is given in brackets: coal, CH (455); methanol, CH3OH, (726); 1-propanol, C3H7OH, (2021); methane (890).

 

[1981Grant]

I'm not sure what this question is asking. Just ask your teacher. Teachers are there for a reason.