The Combustion of 1 Mole of Octane,C₈H₁₈(l),to Produce Carbon Dioxide $\Delta$

The combustion of 1 mole of octane,C₈H₁₈(l) ,to produce carbon dioxide and liquid water has $\Delta$ H_r = -5471 kJ.mol ^{- 1} at 298 K.What is the change in internal energy for this reaction?

A) (-5460 kJ.mol ^{- 1} )
B) (-5482 kJ.mol^-1 )
C) (-5449 kJ.mol^-1 )
D) (-5471 kJ.mol^-1 )
E) (-5493 kJ.mol ^{- 1} )