
For which of the following reactions is Kc equal to KP?
(a)
(b)
(c)

Interpretation:
For the given reactions, value of equilibrium constant
Concept introduction:
Law of mass action: The rate of chemical reaction is directly proportional to the product of concentrations of reactant to products.
Relation between
Explanation of Solution
Reason for correct option:
- For the given reaction (c),
The ratio of mass action can be written as,
As the relation known,
Considering T and R remains constant, the change in moles varies,
Therefore for reaction (c),
Change in moles =
The relation becomes,
Therefore,
Hence, the correct option is (c).
Reason for in-correct option:
- For the given reaction (a),
The ratio of mass action can be written as,
Water (also act as solvents in reaction) in homogeneous equilibria does not appear in the equilibrium constant expressions.
As the relation known,
Considering T and R remains constant, the change in moles varies,
Therefore for reaction (a),
Change in moles =
The relation becomes,
Therefore,
- For the given reaction (b),
The ratio of mass action can be written as,
As the relation known,
Considering T and R remains constant, the change in moles varies,
Therefore for reaction (b),
Change in moles =
The relation becomes,
Therefore,
Hence, the in-correct options are (a and b).
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Chapter 14 Solutions
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