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I want to create a visual comparison between different sources of energy. I would like to show how much wood, coal, methane, water+level difference, etc. could potentially generate the same energy of one litre of petrol. I would I go about it with some calculations? And are there some data I can use as a reference?

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  • $\begingroup$ Heats of combustion per kg generally work pretty well for this purpose. $\endgroup$
    – probably_someone
    Commented Jul 7, 2017 at 20:18
  • $\begingroup$ This link has a table with heats of combustion. $\endgroup$
    – user122423
    Commented Jul 7, 2017 at 20:23
  • $\begingroup$ Would Chemistry be a better home for this question? $\endgroup$
    – Qmechanic ♦
    Commented Jul 7, 2017 at 20:24
  • $\begingroup$ -1. No research effort. Did you try using an internet search to find data? $\endgroup$
    – sammy gerbil
    Commented Jul 8, 2017 at 10:32

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The best ever IMO is this link which contains data as well as this nice enter image description here

pictorial answer from xkcd (link to original comic here).

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