If the hood in Problem 3-9 is used for handling trichloroethylene, determine the rate of air passing into the hood face to keep the concentration

(a) Below the TLV-TWA and

(b) Below the lower explosive limit. Then

(c) Compare these rates with the recommended rate shown in Problem \(3-9\). The temperature is \(25^{\circ} \mathrm{C}\) and the pressure is \(1 \mathrm{~atm}\). In all cases, the evaporation rate is 0.04 \(\mathrm{kg} / \mathrm{min}\).

Problem 3-9

Determine the recommended air volumetric flow rate, in \(\mathrm{m}^{3} / \mathrm{min}\), that is required for a hood having face dimensions of \(1.22 \mathrm{~m}\) (height) and \(0.91 \mathrm{~m}\) (width).