Question

The equilibrium constant. K_c for the reaction

P₄(g) 2P₂(g)

is 1.4 at 400°C. Suppose that 3 moles of P₄(g) and 2 moles of P₂(g) are mixed in 2 litre container at 400°C. What is the value of reaction quotient (Q)-

• A. 3/2
• B. 2/3
• C. 1
• D. None of these

Answer 1

Answer: (B)

2/3

Answer 2

Q_c = $\frac { \left[ \mathrm { P } _ { 2 } ( \mathrm {~g} ) \right] ^ { 4 } } { \left[ \mathrm { P } _ { 4 } ( \mathrm {~g} ) \right] }$= $\frac { ( 1 ) ^ { 2 } } { ( 3 / 2 ) }$= 2/3