The value of ΔH° for the oxidation of solid elemental sulfur to gaseous sulfur dioxide,
S (s,rhombic) + O₂ (g) → SO₂ (g)
Is ________ kJ/mol.

Question

The value of ΔH° for the oxidation of solid elemental sulfur to gaseous sulfur dioxide, S (s,rhombic)+ O₂ (g)→ SO₂ (g) Is ________ kJ/mol.

Quizplus · Accepted Answer

The oxidation reaction of solid sulfur to sulfur dioxide is exothermic, which means it releases heat. The negative sign in front of the value of ΔH° indicates that the reaction is exothermic. Therefore, the best choice is B, which corresponds to the negative value of ΔH° (-269.9 kJ/mol).

The Value of ΔH° for the Oxidation of Solid Elemental