Question

What is the reaction quotient (Q) for the following reaction at 298K, if the partial pressures of reactants and products are as follows:2NO2(g) ⇌ 2NO(g) + O2(g)[NO2] = 0.5 atm, [NO] = 0.3 atm, and [O2] = 0.7 atm.

Answer 1

To calculate the reaction quotient  Q  for the given reaction, we need to use the expression for Q based on the partial pressures of the reactants and products:Q =  [NO]^2 * [O2]  / [NO2]^2Given the partial pressures of the reactants and products:[NO2] = 0.5 atm[NO] = 0.3 atm[O2] = 0.7 atmPlug these values into the Q expression:Q =  0.3^2 * 0.7  /  0.5^2 Q =  0.09 * 0.7  / 0.25Q = 0.063 / 0.25Q  0.252The reaction quotient  Q  for the given reaction at 298K is approximately 0.252.