The equilibrium composition for the reaction at 298 K is:

If 0.2 mol of is added at the same temperature, the equilibrium concentration of is .

for the reaction at 298 K is 20.

Question

The equilibrium composition for the reaction  at 298 K is:

If 0.2 mol of  is added at the same temperature, the equilibrium concentration of  is .

for the reaction at 298 K is 20.

Canvas Classes · Accepted Answer

Step 1 — Verify :

Step 2 — New initial conditions after adding 0.2 mol  (V = 1 L):

Step 3 — Check :

Reaction shifts forward.

Step 4 — ICE table (let  = increase in ):

| | PCl₃ | Cl₂ | PCl₅ |
|--|--|--|--|
| Initial | 0.2 | 0.3 | 0.40 |
| Change |  |  |  |
| Equil. |  |  |  |

Taking smaller root:

Answer: 49

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