In the gas phase reaction A(g) + B(g) C(g), reactants A and B are fed equimolar to an adiabatically operated tubular reactor at 450 C and 1 atm total pressure. Calculate the gap time required to reach the 10% conversion of B. CpA= 36.8 cal/(mol.K), CpB= 20.2 cal/(mol.K), CpC= 59.5 cal/(mol.K), HR= -30000 cal/mol R=1,987 cal/(mol.K), R=0.082 (L.atm)/(mol.K) kB=107.5.exp(-27500/R.T) L/(mol.s)