Equilibrium Question 591

Question: Consider the following reversible reaction at equilibrium, $ 2H_2{O_{(g)}} $ ⇌ $ 2{H_{2(g)}}+{O_{2(g)}} $ ; $ \Delta H=241.7,kJ $ Which one of the following changes in conditions will lead to maximum decomposition of $ H_2{O_{(g)}} $ [Kerala PMT 2004]

Options:

A) Increasing both temperature and pressure

B) Decreasing temperature and increasing pressure

C) Increasing temperature and decreasing pressure

D) Increasing temperature at constant pressure

Show Answer

Answer:

Correct Answer: C

Solution:

$ \Delta H $ is positive so reaction move forward by increase in temperature & value of $ \Delta n=3-2=+1 $ is positive so it forward with decrease in pressure.



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