Question Detail
Question
In the thermochemical equation H₂O(l) → H₂O(g) ΔHᵥₐₚ° = 40.66 kJ/mol, what does the positive sign indicate?
Correct Answer
Option B is the correct answer.
Detailed Explanation
A positive ΔH indicates an endothermic reaction, meaning 40.66 kJ of energy is absorbed to convert 1 mole of liquid water into vapor.
Hint
The notes explain this example.