The gas phase dimerization reaction 2 NO2 = N2O4 has an equilibrium constant of Kc = 4.72 at 373 K (when all concentrations are measured in M units).

a) What is delta G o for this reaction?

b) At what reactant and product concentration is the reaction free energy equal to delta G o?

c) Use the quadratic equation to obtain an expression for [NO2] as a function of the total nitrogen concentration [N]T = [NO2] + 2[N2O4], and plot both [NO2] and [N2O4] as functions of [N]T (over a range of 0 < [N]T < 1).

d) How is [NO2] related to Kc when [NO2] = [N2O4], and what is the value [N]T at this point?

e) The reaction 2 H = H2 has an equilibrium constant of Kc = 5E-14 at 1000 K. At what total hydrogen concentration [H]T will the equilibrium concentration if atomic hydrogen [H] be equal to that of diatomic hydrogen [H2]?