The enthalpy of combustion of n-octane,C₈H₁₈,is -4.79 × 10⁷ J/kg.What is the enthalpy of combustion expressed in kJ/g? A)-4.79 × 10¹⁰ kJ/g B)-4.79 × 10⁷ kJ/g C)-4.79 × 10³ kJ/g D)-4.79 × 10¹ kJ/g E)-4.79 × 10⁴ kJ/g

Question

Quizplus · Accepted Answer

The enthalpy of combustion is given as -4.79 × 10^7 J/kg. To convert this to kJ/g, divide by 1000 to convert J to kJ and by 1000 to convert kg to g, resulting in -4.79 × 10^1 kJ/g.

The Enthalpy of Combustion of N-Octane,C8H18,is -4

The Enthalpy of Combustion of N-Octane,C₈H₁₈,is -4