Equilibrium Concentrations Calculation for a Chemical Reaction at 430 °C

The equilibrium concentrations of H2, I2, and HI at 430 °C can be calculated using the equilibrium constant (Kc) and the reaction quotient. By setting up an equilibrium table and applying the expressions derived from these constants, we can solve for the changes in molarity and find the equilibrium concentrations of each gas.

Calculating Equilibrium Concentrations

For the given chemical reaction: H2 (g) + I2 (g) ⇄ 2 HI (g) with Kc = 54.3 at 430 °C, we begin by setting up the reaction quotient 'Q' to determine the direction of the reaction. Comparing 'Q' to 'Kc' allows us to predict if the reaction will favor the reactants or products.

After analyzing 'Q', we can establish an equilibrium table to track the changes in molarity for each gas. By expressing the concentrations in terms of the equilibrium constant, we formulate a quadratic equation and solve for the changes in molarity denoted as 'x'.

Substituting the calculated 'x' values back into the initial molarity values allows us to determine the equilibrium concentrations of H2, I2, and HI at 430 °C.

It's essential to note the significance of rounding errors in the calculations and verify the physical feasibility of the obtained solutions to ensure accurate results.