A sulfur burner, burning sulfur of 98% purity with dry air, discharged gas at 1300F containing 16% SO2, 5% O2. and 79% N2. Both the sulfur and the air supplied are at 80F. The heat of combustion of sulfur to SO2 is 127690 BTU/lbmole at 25C. The burner gas is mixed with more dry air (secondary air) and passed through a converter. Analysis of the converter gas shows 4.2% SO2. 7.5% O2 and 88.3% N2. An absorber subsequently removes 95% of the SO3 in the converter gas by absorbing it in 97% H2SO4 to produce 100% H2SO4 solution. No SO3 is formed in the absorber. a. Calculate the volume of secondary air supplied at 80F and 735 mmHg per 100 lbs impure sulfur entering. b. How many pounds of 97% H2SO4 solution must be supplied per mole of SO3-free converter gas?