1) Monochlorobenzene (M) is produced commercially by the direct catalytic chlorination of benzene (B) At 40C and 120kPa absolute. In the process, dichlorobenzene (D) is generated as a coproduct: C6H6+Cl2C6H5Cl+HClC6H5Cl+Cl2C6H4Cl2+HCl Liquid and gas streams leave the reactor. The liquid contains 49.2wt%M,29.6%D, and the remainder unreacted B. The gas, which is sent to a treatment facility, contains 92%(v/v)HCl and 8% unreacted chlorine. (a) What volume of gas leaves the reactor (m3/kgB fed)? (b) The pipe through which the gas is to flow is sized so that the gas velocity is no greater than 10m/s. Derive an expression relating pipe diameter dp(cm) to benzene feed rate mBo(kgB/min). Molecular weights: (Monochlorobenzene=112.6 kg/ kmol, Dichlorobenzene=147 kg /kmol, Benzene=78.12 kg/ kmol )