Asked by erika

The equilibrium constant for the formation of phosphorus pentachloride is 1.9. If the partial pressure of each gas is 0.5 atm, will the reaction (as written) proceed forward or backward to reach equilibrium?
PCl3(g) + Cl2(g) PCl5(g)

A. Backward, because K is greater than Q
B. Backward, because K is less than Q
C. Forward, because K is less than Q
D. Forward, because K is greater than Q

I know that this is either B or D, but am not sure which. Can you help me please?
Answered by bobpursley
Q=.5

K=1.9

K>Q

shifts right.

http://chem.libretexts.org/Core/Physical_and_Theoretical_Chemistry/Equilibria/Chemical_Equilibria/The_Reaction_Quotient/Difference_Between_K_And_Qhttp://chem.libretexts.org/Core/Physical_and_Theoretical_Chemistry/Equilibria/Chemical_Equilibria/The_Reaction_Quotient/Difference_Between_K_And_Q
Answered by erika
the answer was B? K<Q
Answered by bobpursley
Hmmmm. We are on different planets.
Answered by vsssfsvsdfr
its B. Q=0.5/0.5^2=2
K=1.9
Q>K so reverse reaction
There are no AI answers yet. The ability to request AI answers is coming soon!