Question Detail
Question
For 2CO(g) + 1/2 O2(g) -> 2CO2(g), ΔH = __________ kJ/mol.
Correct Answer
Option B is the correct answer.
Detailed Explanation
This is twice the combustion reaction of CO to CO2. ΔH_comb(CO) = -283 kJ/mol, so for 2 mol it's -566 kJ.
Hint
Scale the known enthalpy of combustion of CO by 2.