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27 April, 17:04

1. What is the equation for the equilibrium constant, Keq, for the following general reaction: aA + bB → cC + dD Define each term in the equation.

2. What is the actual free energy change of the reaction above? Again, define each term in the equation. Express this equation in terms of mass action Q

3. What is the standard free energy change of the reaction above? Again, define each term.

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  1. 27 April, 20:24
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    From the reaction; aA + bB → cC + dD

    1) Keq = equilibrium constant = [A]^a [B]^b / [C]^c [D]^d

    where [A] = [B] = [C] = [D] are the concentrations of reactants A, B, C and D respectively.

    2) What is the actual free energy change of the reaction above?;

    ΔG is the differences between the sum of the free energies of the product and the reactant. Mathematically; ΔG = (cΔGC + dΔGD) - (aΔGA + bΔGB) ΔG, in terms of reaction quotient; ΔG = ΔG (standard) + RT lnQ

    where R = gas constant and T = temperature.

    3) What is the standard free energy change of the reaction above;

    ΔG (Reaction) = Summation ΔGf (products) - summation ΔGf (reactants) where summation ΔGf = standard free energy of formation
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