Read the Assertion and Reason below and choose the correct option. — Thermodynamics and Thermochemistry Chemistry Question

💡 Solution & Explanation

Graphite is the most thermodynamically stable standard reference state for carbon. Diamond sits at a higher energy state ($\Delta H_f \approx +1.9\text{ kJ/mol}$). Consequently, when diamond is combusted to the same final state ($\text{CO}_2$), it releases more energy (larger magnitude of combustion enthalpy) because it starts from a higher energy level. Statement II correctly explains Statement I.