Mass Transfer Penetration theory states that the mass transfer co-coefficient is equal to (where, De is diffusivity and 't' is time) (4De/πt)1/2 (De.t)1/2 (De/t)1/2 (4De/t) (4De/πt)1/2 (De.t)1/2 (De/t)1/2 (4De/t) ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Use of raschig rings in place of crushed stones as packing in packed beds (other things being same) Decreases pressure drop, increases surface area Decreases pressure drop, decreases surface area Increases pressure drop, decreases surface area Increases pressure drop, increases surface area Decreases pressure drop, increases surface area Decreases pressure drop, decreases surface area Increases pressure drop, decreases surface area Increases pressure drop, increases surface area ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer If a two phase system is in physical equilibrium; then it means that, the Total pressure throughout the liquid phase is equal to that throughout the vapor phase Escaping tendency of each component from the liquid phase to the vapor phase is exactly equal to that from vapor phase to liquid phase All of these Temperature of the liquid phase is equal to that of the vapor phase Total pressure throughout the liquid phase is equal to that throughout the vapor phase Escaping tendency of each component from the liquid phase to the vapor phase is exactly equal to that from vapor phase to liquid phase All of these Temperature of the liquid phase is equal to that of the vapor phase ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are 8 9 10 1 8 9 10 1 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer _______ number indicates the ratio of the rates of the heat and mass transfer incase of a cooling tower. Stanton Sherwood Lewis Peclet Stanton Sherwood Lewis Peclet ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The diffusivity (D) in a binary gas mixture is related to the temperature (T) as D ∝ T2 D ∝ T1.5 D ∝ T D ∝ T0.5 D ∝ T2 D ∝ T1.5 D ∝ T D ∝ T0.5 ANSWER DOWNLOAD EXAMIANS APP
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