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Consider this system in a fixed volume at constant temperature - HSC - SSCE Chemistry - Question 11 - 2021 - Paper 1
Question 11
Consider this system in a fixed volume at constant temperature. $$\text{PCl}_3(s) \rightleftharpoons \text{PCl}_5(l) + \text{Cl}_2(g)$$ This system is initially at... show full transcript
Worked Solution & Example Answer:Consider this system in a fixed volume at constant temperature - HSC - SSCE Chemistry - Question 11 - 2021 - Paper 1
Step 1
The amount of Cl2 will not change.
Answer
When a small amount of solid PCl3 is added to the equilibrium system, it will not affect the concentration of the gaseous products ( Cl2), because the solid does not contribute to the equilibrium concentrations. Hence, the amounts of PCl3 and Cl2 will remain constant since the reaction will respond to the addition of solid PCl3 without changing the primary equilibrium established.