Carbon monoxide and oxygen gas react to form carbon dioxide.How much heat is released when 89.5 grams of O₂ (g)reacts with excess CO? ΔH° = -482 kJ. A)1.35 × 10^{3 kJ} B)2.70 × 10³ kJ C)1.35 × 10^-³ kJ D)674 kJ E)4.31 × 10⁴ kJ

Question

Quizplus · Accepted Answer

The correct answer is based on the stoichiometry of the reaction and the given ΔH°. Since 89.5 grams of O2 is equivalent to 2.8 moles (using the molar mass of O2 = 32 g/mol), and the reaction releases -482 kJ per mole of O2, the total heat released is 2.8 moles × (-482 kJ/mole) = -1350 kJ, which is approximately 1.35 × 10^3 kJ.

Carbon Monoxide and Oxygen Gas React to Form Carbon Dioxide