We expect the enthalpy of cumbustion of two isomers to be the molecular formulas of two molecules are so the balanced chemical equation for the two combustion reactions in calculation of combustion enthalpy from of products and reactants, the difference will be in the the

different, isomers, standard enthalpies of formation, combustion products, standard enthalpies of combustion, the same, very similar

the rod-shaped n-pentane has than the neopentane

tetrahedral, less, vibrational and rotational motions, more, translational motion, spherical