Q2(a) A glass tube 1 mm diameter was filled with benzene to within 2.3 cm from the top and maintained at a temperature of 25 C and 765.5 mm Hg pressure in a gentle current of air. The position of liquid surface was measured with a traveling microscope. After eighty minutes, the level had fallen by 0.148 cm. Data: Vapor pressure of benzene @ 25 C = 74.6 mm Hg Density of benzene at 25C = 879 kg/m3 (0) Illustrate and identify the given data (ii) Calculate the diffusivity of benzene in air. Calculate the loss in Omani riyals, if benzene is worth 274 OMR/L (b) Identify two mass transfer operations that you encounter every day, along with a detailed technical explanation of each operation. [3] [5] [4] [8]