Answer to Question #177079 in Physical Chemistry for dad

Question

PCl₃(g) + Cl₂(g) ⇄ PCl₅(g)          Kc = 6.5

At a certain point in time, a 1.00 L rigid reaction vessel contains 0.5 mol of PCl₃(g), 0.25 mol of Cl₂(g), and 2.5 mol of PCl₅(g). Which of the following describes how the measured pressure in the reaction vessel will change and why it will change that way as the reaction system approaches equilibrium at constant temperature? EXPLAIN

A)The pressure will increase because Q > Kc.

B) The pressure will increase because Q < Kc.

C)The pressure will decrease because Q < Kc.

D)The pressure will decrease because Q > Kc.

Answer 1

A)The pressure will increase because Q > Kc.