Q- For the reaction PCl5 ----> PCl3 + Cl2 , the forward reaction at constant temperature is favoured by : (one or more choices may be correct )
(a) introducing inert gas at constant pressure
(b) introducing inert gas at constant volume
(c) introducing PCl5 at constant volume
(d) introducing Cl2 at constant volume
Answers
Answer: Option (a) is the correct answer.
Explanation:
According to Le chatelier's principle, if a system in equilibrium is disturbed by changes in determining factors, such as temperature, pressure, and concentration of components then the system will tend to shift its equilibrium position in such a way so as to counteract the effect of the disturbance.
At constant volume, there will be increase in total pressure of the system but the partial pressure of both the reactants and products remain the same. Hence, there will be no effect on equilibrium.
At constant pressure, there will be increase in total volume. Therefore, there will be decrease in number of moles per unit volume of each reactant and product. Hence, the equilibrium will shift towards the side where number of moles are increased.
Thus, we can conclude that introducing inert gas at constant pressure will favour the forward reaction for the given reaction at constant pressure.
Answer:
Adding inert gas at constant pressure
Explanation:when inert gas is added at constt pressure forward reaction is favoured .
Because acc to le chatelier principle -when inert gas is add at constt pressure reaction will shift in that side where greater no. Of moles are present .nd in this reaction products have more moles as compared to reactants.