Question Detail
Question
For C(s) + 1/2 O2(g) -> CO(g), ΔH = __________ kcal/mol.
Correct Answer
Option A is the correct answer.
Detailed Explanation
This is the standard enthalpy of formation of CO(g), which is -110.5 kJ/mol. In kcal (1 kcal ≈ 4.184 kJ), this is approximately -26.4 kcal/mol.
Hint
Formation of CO from its elements is exothermic.