S + O₂ → SO₂ ΔH = -70.8 kcal
Based on the reaction shown,which statement is true?

Question

S + O₂ → SO₂ ΔH = -70.8 kcal Based on the reaction shown,which statement is true?

Quizplus · Accepted Answer

The given equation shows the heat of reaction for the reaction involving sulfur, and the value of -70.8 kcal is the heat released when 1 mole of sulfur reacts. To determine the amount of sulfur that would give off this amount of heat, we need to use the molar mass of sulfur, which is 32.1 g/mol. Therefore, (70.8 kcal/mol) x (1 mol/32.1 g) = 2.2 kcal/g. This means that 2.2 kcal of heat are released when 1 g of sulfur reacts, and thus 70.8 kcal would be produced when 32.1 g (1 mole) of sulfur reacts. Therefore, option C is correct.

S + O2 → SO2 ΔH = -70

S + O₂ → SO₂ ΔH = -70