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Chemical Engineering · Q133

Chemical Engineering Thermodynamics

Engineering and GATE · Chemical Engineering · question 133

Q133

In case of the decomposition of hydroiodic acid (2H I ⇋ H2 + I_2 ), addition of H2 (at equilibrium condition) will

In case of the decomposition of hydroiodic acid (2H ⇋ H2 + ), addition of H2 (at equilibrium condition) will
A.
Increase the partial pressure of
B.
Decrease the partial pressure of H
C.
Diminish the degree of dissociation of H
Answer
D.
None of these

Answer: Option C

Solution

Answer: Option C
Solution:
Lechalters principle: Actually for an equilibrium reaction on increasing the reactant concentration the equilibrium shifts towards the right and therefore the reactants gets more dissociated and products concentration increases but here we are increasing the product  concentration so the equilibrium shifts towards left and increases the formation of  there by decreasing the dissociation of .