This means that the formation of one mole of SO₂ from its elements (sulfur and oxygen) in their standard states releases 296.83 kJ of heat.
Here's the reaction for the standard enthalpy of formation:
S(s) + O₂(g) → SO₂(g) ΔH°f = -296.83 kJ/mol
Important Notes:
* Standard Conditions: This value is given under standard conditions (298 K and 1 atm).
* Exothermic Reaction: The negative sign indicates that the reaction is exothermic, meaning heat is released during the formation of SO₂.
* Other Sources: You might find slightly different values for the heat of formation depending on the source. These discrepancies are usually minor and result from variations in measurement methods or the use of different reference states.
