Mass Transfer According to the film theory of mass transfer, the mass transfer co-efficient is proportional to (where, D = molecular diffusivity) D2 1/D D0.5 D D2 1/D D0.5 D ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In the constant rate period of the rate of drying curve for batch drying, Surface evaporation of unbound moisture occurs Cracks develop on the surface of the solid None of these Rate of drying decreases abruptly Surface evaporation of unbound moisture occurs Cracks develop on the surface of the solid None of these Rate of drying decreases abruptly ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer If f = moles of vapour present per mole of feed, then the slope of feed line is - f/(1 - f) - (f - 1)/f (1 - f)/f - 1/f - f/(1 - f) - (f - 1)/f (1 - f)/f - 1/f ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Back-trapping in a distillation column Is desirable, as it provides improved vapour-liquid contact Decreases tray efficiency Reduces pressure drop Increases tray efficiency Is desirable, as it provides improved vapour-liquid contact Decreases tray efficiency Reduces pressure drop Increases tray efficiency ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer A liquid mixture contains 30% o-xylene, 60% p-xylene and 10%. m-xylene (all percentages in w/w). Which of the following statements would be true in respect of this mixture? The composition of the mixture in mole percent is: o-xylene 30, p-xylene 60 and m-xyoene 10 The mixture exhibits an azeotrope at 101.3 kPa The composition of the mixture, in percent by volume is: o-xylene 30, p-xylene 60. and m-xylene 10 The mixture contain optical isomers The composition of the mixture in mole percent is: o-xylene 30, p-xylene 60 and m-xyoene 10 The mixture exhibits an azeotrope at 101.3 kPa The composition of the mixture, in percent by volume is: o-xylene 30, p-xylene 60. and m-xylene 10 The mixture contain optical isomers ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer The binary diffusivity in gases at atmospheric conditions is about 10-9 cm/sec 10-4 cm²/seC₂ 10-1 cm²/sec 10-3 sec/cm 10-9 cm/sec 10-4 cm²/seC₂ 10-1 cm²/sec 10-3 sec/cm ANSWER DOWNLOAD EXAMIANS APP
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