What happens to the disociation of `PCl_(5)` in a closed vassel if helium gas is introduced into it at the same temperature ?

Explanation

To understand what happens to the dissociation of \( PCl_5 \) when helium gas is introduced into a closed vessel at the same temperature, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Dissociation Reaction**:
- The dissociation of phosphorus pentachloride (\( PCl_5 \)) can be represented by the following chemical equation:
\[
PCl_5 (g) \rightleftharpoons PCl_3 (g) + Cl_2 (g)
...