Read aloud 0 Add text V Draw Highlight Problem #2 (A - 15 pts; B - 30+ 5 pts: 50 pts) A. Circle the single answer that represents your best response to the question. A-1 The TLV -Threshold Limit Value is defined for the following exposure time a. continuous exposures. b. a daily 8 hour exposure, but no more than 40 hours per week. c. only an 8 hour exposure d. only a 40 hour exposure A-2 When filling a container with liquid, the fundamental processes that occur are: mass transfer only b. displacement of the gas by the liquid only. both mass transfer and displacement of the gas by the liquid. A-3 A 10.000 liter vessel is filled with a liquid solvent at a rate of 50 liter/min. a filling time and constant filling rate are 20 min and 5.0 x10 min respectively b. filling time and constant filling rate are 50 min and 2.0 x 10 min., respectively e filling time and constant filling rate are 100 min and 10 x 10 min. respectively d. filling time and constant filling rate are 200 min and 5.0 x10 min respectively a. c. B. A worker splash fills hexane (MW: 86.18: TLV-TWA: 50 ppm) into 4 2642-gallon (.e., 10 m volume) vessel through a 10-cm diameter filling hole. It takes abour 2 br to till the vessel at a constant filling rate. The local ventilation rate is 150 m man the ambient, pressure and temperature are 1 atm (760 mm Hg) and 25C, respectively. Assume uverige non-ideal mixing factor k for the ventilation condition. The vapor pressure of hexane can be estimated using Antoine equation with the uiven constants B In ) where is ink and pear is the saturation pressure mm ilgi +7 Antoine constants for his ne: A = 15.8366, B= 2697.50 and C= 18.78 o 44F ~ A-2 exposure d. only a 40 hour exposure When filling a container with liquid, the fundamental processes that occur are: mass transfer only b. displacement of the gas by the liquid only. both mass transfer and displacement of the gas by the liquid. a. c. A-3 a. A 10,000 liter vessel is filled with a liquid solvent at a rate of 50 liter/min. filling time and constant filling rate are 20 min and 5.0 x 10 min respectively b. filling time and constant filling rate are 50 min and 2.0 x 10 min, respectively filling time and constant filling rate are 100 min and 1.0 x 10 min respectively d. filling time and constant filling rate are 200 min and 5.0 x 10 min, respectively c. B. A worker splash fills hexane (MW: 86.18: TLV-TWA: 50 ppm) into a 2642-gallon fi.e., 10 m volume) vessel through a 10-cm diameter filling hole. It takes about 2 hr to fill the vessel at a constant filling rate. The local ventilation rate is 150 m'min, the ambient pressure and Temperature are 1 atm ( 760 mm-Hg) and 25C. respectively. Assume average non-ideal mixing factor k for the ventilation condition. The vapor pressure of hexane can be estimated using Antoine equation with the given constants: B In(P) = A - where T is in K and Psat is the saturation pressure (mm Hg) C+1 Antoine constants for hexane A = 15.33GG. B=2697.36 and C = -18.78 Estimate the local concentration of the hexans om What observations you can make reading sure to be ane