D. The following reaction has achieved equilibrium. Predict the effect on the fo
ID: 631827 • Letter: D
Question
D. The following reaction has achieved equilibrium. Predict the effect on the formation of phosphorous pentachloride (increase, decrease or no effect) for the stated changes to the system: PCl3(g) + Cl2(g) ? PCl5(g) a) The concentration of phosphorous trichloride is increased. b) The concentration of chlorine is decreased. c) The volume of the container in which the reaction is taking place is suddenly made smaller. d) The pressure of the system is increased by adding one atmosphere of gaseous nitrogen to the container.
E. Newton
Explanation / Answer
A) When the concentration of PCl3 is increased, the equilibrium will shift towards the left, because the system will tend to decrease the concentration of PCl3, so that the backward reaction is favoured.
B)The concentration of chlorine is decreased.then it will shift to that place where it wil regain the equilibrium by forming more Cl therefore it shift to left
C) when volume is decreased as volume is inversely proportional to pressure and thus decrease in volume implies increase in pressure at constant temperature.
D)The pressure of the system is increased by adding one atmosphere of gaseous nitrogen to the container no change will occur because N2 is not the part of reaction.
E) Newtons 3rd law: To every action there is always an equal and opposite reaction: or the forces of two bodies on each other are always equal and are directed in opposite directions
Le Chatelier
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