6675. The combustion equations of carbon and carbon monoxide are as follows: C + O₂ = CO₂, ΔH = – 394 kJ/kg . mole CO + 1/2 O₂ = CO₂, ΔH = – 284.5 kJ/kg. mole. The heat of formation of CO is __________ kJ/kg. mole. September 7, 2025 by Admin -109.5 109.5 180 100 ✅ The correct answer is option A.