Question #dcd39

1 Answer
P dilip_k
Mar 11, 2017

The free energy change #DeltaG# of a chemical reaction is related with Enthalpy change #DeltaH #, Entropypy change #DeltaS # and the absolute temperature #T# of the reaction as follows

#DeltaG=DeltaH-T DeltaS#

The combustion reaction of hydrocarbon exothermic one.
So #DeltaH <0# again as per given balanced equation the number of moles of gaseous product (12moles) is greater than that of gaseous reactants (9moles). So #DeltaS>0 # and #T>0#

So as a whole RHS #DeltaH-T DeltaS<0#

Hence the free energy change of the reaction

#DeltaG<0->"The reaction is spontaneous"#

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