How many moles of are produced? — Thermodynamics and Thermochemistry Chemistry Question

💡 Solution & Explanation

Using energy balance with the total heat evolved (87.3 kcal) at 800 K: Q_reaction = Q_temp_rise + Q_surroundings. Solving for the fraction of octane forming $CO_2$ vs $CO$, we find that exactly 0.4 moles of $CO_2$ are produced.