Question

Calculate the reaction quotient, Q, for the following balanced chemical reaction at 298 K:2NO(g) + O2(g) ⇌ 2NO2(g)Given that the initial concentrations of NO, O2 and NO2 are 0.10 M, 0.15 M and 0.05 M, respectively.

Answer 1

To calculate the reaction quotient, Q, we use the expression:Q = [Products]^coefficients / [Reactants]^coefficientsFor the given reaction:2NO g  + O2 g   2NO2 g The Q expression is:Q = [NO2]^2 /  [NO]^2 * [O2] Now, we can plug in the initial concentrations:Q =  [0.05 M]^2  /   [0.10 M]^2  * [0.15 M] Q =  0.0025  /  0.01 * 0.15 Q = 0.0025 / 0.0015Q = 1.67So, the reaction quotient, Q, for the given reaction and initial concentrations is 1.67.