Mass Transfer
Diffusion co-efficient generally depends upon the temperature, pressure & the nature of the components of the system. Its dimension is not the same as that of the

Volumetric diffusivity
Mass transfer co-efficient
Thermal diffusivity
Kinematic viscosity

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Mass Transfer
Henry's law states that the

Partial pressure of a component over a solution is proportional to its mole fraction in the liquid
Vapour pressure is equal to the product of the mole fraction and total pressure
Partial pressure is equal to the product of the mole fraction and total pressure
Partial pressure of a component over a solution is proportional to the mole fraction in the vapour

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