The relation among various mass transfer co-efficients (M.T.C) for ideal gases is given by (where, Kc & Km are M.T.C. for equimolar counter diffusion with concentration & mole fraction respectively as the drivingforce.
and, Kp = M.T.C. for diffusion of a gas through a stagnant inert gas with pressure as drivingforce.
Kc = Kp = Km
Kc = Kp/RT = Km . RT/P
Kc = Kp . RT = Km . RT/p
NONE OF THESE
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Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium
Phosphoric acid is produced in wet process from phosphate rock and
The fugacity of liquid water at 298 K is approximately 3171 Pa. Considering the ideal heat of vaporisation as 43723 J/gm mole, its fugacity at 300 K would be