Species N2O4 and NO2 as gases come to equilibrium by the reaction: N2O4 → 2NO2.
(a) For T = 350 K and P = 5 bar, calculate the mole fractions of these species in the equilibrium mixture. Assume ideal gases.
(b) If an equilibrium mixture of N2O4 and NO2 at conditions of part (a) flows through a throttle valve to a pressure of 1 bar and through a heat exchanger that restores its initial temperature, how much heat is exchanged, assuming chemical equilibrium is again attained in the final state? Base the answer on an amount of mixture equivalent to 1 mol of N2O4, i.e., as though the NO2 were present as N2O4.