Passage VII

Consider the following reaction:

At chemical equilibrium, the formation of hydrogen iodide gas (HI) occurs at the same rate as the formation of hydrogen (H2) and iodine (I2) gases.

At equilibrium, the equilibrium constant, (Keq), is the ratio of the square of the HI concentration ([HI]) to the product of the concentrations of H2 and I2. The table below shows the data collected while varying either the temperature or the initial reactant concentrations.

38. According to the table, increasing the reaction temperature, while keeping the total initial concentration of reactants constant, would result in which, if any, of the following concentration changes?

Answer and Explanation

Your Answer is

Correct Answer is G

Explanation

Compared with tails 1-6, the temperatures are different, but the initial concentrations are the same. The comparison shows that as the temperature increases, the final concentration of HI decreases