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Decomposition of ammonium chloride is an...

Decomposition of ammonium chloride is an endothermic reaction. The equilibrium may be represented as:
`NH_(4)Cl(s) hArr NH_(3)(g)+HCl(g)`
A `6.250 g` sample of `NH_(4)Cl` os placed in an evaculated `4.0 L` container at `27^(@)C`. After equilibrium the total pressure inside the container is `0.820` bar and some solid remains in the container. Answer the followings
The value of `K_(p)` for the reaction at `300 K` is

A

`16.2`

B

`0.168`

C

`1.68`

D

`32.4`

Text Solution

Verified by Experts

The correct Answer is:
B
`P_(NH_(3))=P_(HCl)=0.820/2` bar
`:. K_(p)=P_(NH_(3))xxP_(HCl)=0.41xx0.41=0.168`
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