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Question
Give reasons for the following:
Ozone is thermodynamically less stable than oxygen.
Solution
Ozone is thermodynamically unstable with respect to oxygen since its decomposition into oxygen results in the liberation of heat ( ΔH is negative) and an increase in entropy ( ΔS is positive).
These two effects reinforce each other, resulting in large negative Gibbs energy change ( ΔG) for its conversion into oxygen.
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