Question

For the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g) at a certain temperature, the equilibrium concentrations were observed to be [SO2] = 0.509 M, [O2] = 7.50 × 10–2 M, and [SO3] = 0.650 M. Calculate the value of K for this system at this temperature

Answer 1

first write K expression

K = [SO3]² / [SO2]²[O2]

[SO2] = 0.509 M

[O2] = 0.0750 M

[SO3] = 0.650 M

K = [0.650]² / [0.509]²[0.0750]

K = 0.4225 / 0.0194

K = 21.8