Octane is one of the commonest compounds found in petrol (gasoline). When it burns in a car engine this reaction takes place: C8H18(l) + 12.5O2(g) > 8CO2(g) + 9H2O(l) ∆H = –5400kJ mol–1 (a) Do the products contain more or less chemical energy than the reactants?

let that person have a turn to speak : )

catya that's not even a b or c

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.