A gaseous reaction is represented by the balanced chemical equation
2NO2(g)⇌2NO(g)+O2(g).
Answer the following questions about the equilibrium expressions that can be written for this system.
(1) Part 1: (a) Describe qualitatively how an expression written in terms of molar concentration differs from an expression written in terms of partial pressure for the same reaction.
(2) Part 2: (b) Derive a symbolic relationship between the equilibrium constant expressed with partial pressures and the equilibrium constant expressed with molar concentrations for this reaction. Clearly state any assumptions you make.
(3) Part 3: (c) Under what specific set of conditions would the numerical values of the two equilibrium constants derived in part (b) be identical? Justify your answer.
(4) Part 4: (d) Explain why the overall numerical value of either equilibrium constant is dimensionless even though the constituent terms initially appear to carry units.