The gas phase dimerisation reaction takes place in a continuous constant pressure cstr operating at 1 atm total pressure (a) establish the relationship between the concentration of a, ca, and the fractional (b) obtain an expression that allows the calculation of the volume of a cstr for a c) obtain an expression that allows the calculation of the volume of a cstr for a (d) calculate the ratio of the reactor volumes for the conditions described in (b) and conversion, xa for a feed stream that can contain an inert gas. pure feed of a. feed consisting of an equimolar mixture of a and an inert gas. (c) above.