Pl

Density of liquid

kg/m3

ML-3

Pv

Density of vapour

kg/m3

ML-3

pm

Density of metal

kg/m3

ML-3

£

Mols per unit time of steam for steam distillation

kmol/s

NT-1

a

Surface tension

J/m2 (or N/m)

MT-2

e

Root of equation 11.115

$

Intercept of operating line on Y-axis [xd/(R + 1)]

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