Question Detail
Question
Which of the following reactions shows both positive ΔH and positive ΔS?
Correct Answer
Option B is the correct answer.
Detailed Explanation
Ice melting requires heat input (endothermic, ΔH > 0). It also involves a transition from a solid crystal to a less ordered liquid, which increases the disorder of the system (ΔS > 0).
Hint
Consider a process that absorbs heat (endothermic) and also results in greater disorder.