Question

$P{Cl}_3\left(g\right)+{Cl}_2\left(g\right)\rightleftharpoons P{Cl}_5\left(g\right)+energy$
For the reaction above, what is the effect of increasing the pressure?

• A. Increased production of products
• B. Wild fluctuations in the amounts of reactants and products
• C. Increased production of reactants
• D. No impact on the equilibrium
  

Answer 1

The correct option is A Increased production of products

The given reaction is:-

${PCl}_3\left(g\right)+{Cl}_2\left(g\right)\to {PCl}_5\left(g\right)+energy$

In this reaction, the forward reaction is accompanied by a decrease of moles of gaseous species. So, if pressure on the system is increased then, as per Le Chatelier's principle, the equation shifts in direction in which a decrease in total no. of moles takes place i.e. in formation of products in this case.