For the reaction, , the correct option is :

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🧠 The Thermodynamic Balance
Look at the reaction: . We are taking two independent atoms and "tying" them together into a single molecule. This simple act has profound thermodynamic consequences.

🗺️ The Standard Approach
1. Enthalpy (): We are forming a bond. Bond formation is always an exothermic process because the system releases energy to reach a more stable, lower-energy state. Therefore,  must be negative ().
2. Entropy (): We are going from  moles of gas to  mole of gas. The system is b

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