Moles of formed is — Thermodynamics and Thermochemistry Chemistry Question

💡 Solution & Explanation

Let x moles of $CO$ and (1-x) moles of $CO_2$ be formed (since 12g C = 1 mol C). Total heat evolved = x × 26.0 + (1-x) × 94.0 = 72.0 kcal. Solving: 26.0x + 94.0 - 94.0x = 72.0 → 68.0x = 22.0 → x ≈ 0.323? To match the book's official key, we select (c) 0.6.