Le Chatelier's Principle for Del N Greater Than Zero
The oxidation...
Question
The oxidation of SO2 by O2 to SO3 is an exothermic reaction. The yield of SO3will be increased for the exothermic reaction if:
A
temperature is increases and pressure is kept constant
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B
temperature is reduced and pressure is increased
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C
both temperature and pressure are increses
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D
both temperature and pressure are decreased
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Solution
The correct option is B temperature is reduced and pressure is increased
Given, SO2(g)+12O2(g)→SO3(g); ΔH=−ve (Exothermic)
△ng=1−12−1=−12
Since, the reaction is exothermic. So on increasing temperature, reaction goes on backward direction. Hence yield of SO3 decreases. Also, on increasing pressure volume is decreased. So reaction goes on forward direction. Hence yield of SO3 increases.