a a. Problem #4 Benzene and toluene form an ideal liquid mixture. A mixture composed of 55 mol % benzene and 45 mol% toluene is used in a chemical plant. The temperature is 25C, and the pressure is 1 atm. Determine the mixture TLV b. Determine the evaporation rate per unit area for this mixture. A drum with a 2-in-diameter bung is used to contain the mixture. Determine the ventilation rate required to maintain the vapor concentration below the TLV. The ventilation quality within the vicinity of this operation is average (see Table 3-15 for mixing factor k). C. Benzene Toluene Ethyl Acetate Molecular Weight Specific Gravity TLV (ppm) 78.11 0.879 0.5 92.13 0.866 88.1 0.901 400 20 Vapor pressure from Antoine Equation for pure component B sat sat log10 P = = A- ; p in mm Hg, and T inC T+C' Antoine constants for benzene, toluene and ethyl acetate: A B Benzene 6.89272 1203.531 219.888 Toluene 6.95805 1346.773 219.693 Ethyl acetate 7.10179 1244.951 217.881