Question

Consider the reaction where K = 0.5 at a particular temperature 

PCI_5(g) ⇌ PCI_3(g) + Cl_2(g) if the three gases are mixed in a container so that the partial pressure of each gas is initially 1 atm, then which one of the following is true? 

(a) more PCI₃ will be produced 

(b) more Cl₂ will be produced 

(c) more PCI₅ will be produced 

(d) none of these

Answer 1

(c) more PCI₅ will be produced 

K_p = 0.5

Q = (1 x 1) / 1

Q > K_p 

∴ Reverse reaction is favoured; i.e., more PCI₅ will be produced.