Consider the following reaction that occurs in air with a pressure of 1.013bar. One can assume that there is 1 mole of SO2 with 0.5 moles of O2 (with air at 21%O2 ) fed to the reactor. SO2(g)+0.5O2(g)SO3(g) (a) Find an expression for Ka in terms of composition and pressure. (b) Considering the temperature dependence of the reaction, what are the value for Ka at 0, 400 and 1000C ? (c) Determine the extent of reaction and gas phase composition for the conditions in part b