Question

What is the value of the reaction quotient Q for the following chemical reaction at a temperature of 25°C, given the concentrations of reactants and products: 2H2(g) + O2(g) → 2H2O(g) [H2] = 0.25 M [O2] = 0.15 M [H2O] = 0.20 M

Answer 1

To calculate the reaction quotient Q for the given reaction, we need to use the expression for Q based on the balanced chemical equation and the given concentrations of reactants and products.For the reaction:2H2 g  + O2 g   2H2O g The expression for Q is:Q = [H2O]^2 /  [H2]^2 * [O2] Now, we can plug in the given concentrations:[H2] = 0.25 M[O2] = 0.15 M[H2O] = 0.20 MQ =  0.20 ^2 /   0.25 ^2 *  0.15  Q = 0.04 /  0.0625 * 0.15 Q = 0.04 / 0.009375Q  4.27The value of the reaction quotient Q for the given reaction at 25C is approximately 4.27.