1. A gas phase reaction 4A - B + 6C taking place at 650 "C, the reaction rate can be expressed as -rA= k CA, where k is 10 hr-. If the reaction is taking place in a PFR operating at 650 'C and 1 1 atm. The feed stream contains 1/3 of inert gas. In order to achieve 75% conversion, calculate the volume of the reactor. (a) derive the rate equation in terms of conversion XA, considering volume expansion and inert gas ( 10%) (b) determine the residence time t (15%)1. A gas phase reaction 4A - B + 6C taking place at 650 "C, the reaction rate can be expressed as -rA= k CA, where k is 10 hr-. If the reaction is taking place in a PFR operating at 650 'C and 1 1 atm. The feed stream contains 1/3 of inert gas. In order to achieve 75% conversion, calculate the volume of the reactor. (a) derive the rate equation in terms of conversion XA, considering volume expansion and inert gas ( 10%) (b) determine the residence time t (15%)