KCET · Chemistry · p Block Elements (Group 15, 16, 17 & 18)
Conversion of oxygen into ozone is non-spontaneous at
- A high temperature
- B low temperature
- C all temperatures
- D room temperature
Answer & Solution
Correct Answer
(C) all temperatures
Step-by-step Solution
Detailed explanation
Conversion of oxygen into ozone is endothermic process \((\Delta \mathrm{H}=+\mathrm{ve})\) and proceeds through decrease in entropy
\((\Delta \mathrm{S}=-\mathrm{ve})\)
\(3 \mathrm{O}_{2}(g) \rightleftharpoons 2 \mathrm{O}_{3}(g)\)
\(\Delta \mathrm{G}=\Delta \mathrm{H}-\mathrm{T} \Delta \mathrm{S}\)
\(\Delta \mathrm{G}=+\mathrm{ve}\)
Therefore, reaction is non-spontaneous at all temperatures
\((\Delta \mathrm{S}=-\mathrm{ve})\)
\(3 \mathrm{O}_{2}(g) \rightleftharpoons 2 \mathrm{O}_{3}(g)\)
\(\Delta \mathrm{G}=\Delta \mathrm{H}-\mathrm{T} \Delta \mathrm{S}\)
\(\Delta \mathrm{G}=+\mathrm{ve}\)
Therefore, reaction is non-spontaneous at all temperatures
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