Single Choice

A solid $$XY$$ kept in an evacuated sealed container undergoes decomposition to form a mixture of gases $$X$$ and $$Y$$ at temperature $$T$$. The equilibrium pressure is $$10$$ bar in this vessel. $${K}_{p}$$ for this reaction is:

A$$25$$
Correct Answer
B$$100$$
C$$10$$
D$$5$$

Solution

$$XY \leftrightharpoons X(g)+Y(g)$$
At equilibrium, pressure of $$X$$ and $$Y$$ will be $$P$$(suppose).
So, $$2P=10$$;
$$P=5$$
$$K_p=P_x\times P_y=25$$

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