... one O-H bond. To separate these types of bonds you require a certain amount of energy, which I will show in a table. C-H 410 C-O 360 O-H 510 O=O 496 C=O 740 C-C 350 To separate C-H bond you need to apply 410 joules of energy. There are five such bonds in ethanol so you multiply 410 by five to get 2050 joules. You do these calculations for all the other types of bonds that make up ethanol, add them all together and you get 3270 joules. All of the other alcohols can be broken up in this way. Below is a table showing the energy required to break up the bonds in each alcohol. Type of alcohol Energy required to break the bonds in the alcohol (j) Methanol 2100 Ethanol 3270 Propanol 3740 Butanol 4560 Pentanol 5380 As you can see a longer molecule takes more energy to break its bonds, in this case Pentanol. Compared to a smaller molecule, methanol that ...

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