What is a fluid fluid interface?
The surface of the liquid film in contact with the surrounding gas is a fluid-fluid interface. Other examples include the interface between a liquid drop and the surrounding continuous phase or that between two liquid layers.
What is gas liquid interface?
2.3 The Gas–Liquid Interface Is a Special Environment for Photochemistry. The gas–liquid interface presents a unique environment for (photo)chemical reactions. First, reaction at this interface provides access to reactants either within the solution phase, or in the gas phase, or both.
Does adsorption happen only at liquid solid interface?
When adsorption occurs (or may occur) at the interface between a fluid phase and a solid, the solid is usually called the adsorbent; for gas/liquid interfaces it may be in some, but not in all, cases useful to call the liquid phase the adsorbent.
What is adsorption at solid interface?
If a solid comes in contact with a gas or a liquid, there is an accumula-tion of gas or liquid molecules at the interface. This phenomenon is known as adsorption. Adsorption refers to the surface binding of a liquid or gas molecule (adsorbate) onto a solid surface (adsorbent).
When can the fluid be considered at rest?
If shear stress is zero, fluid will be at rest.
What is adsorption at liquid interface?
Adsorption at the liquid interface Adsorption is the adhesion of gaseous particles, ions, or molecules to a surface whether they originate from liquid or solid. Activated molecules or ions are partitioned to surfaces or interfaces when added to liquids. This is termed POSITIVE ADSORPTION.
What is surface and interfacial phenomena?
In short; surface tension is the property of the liquid in contact with gas phase (usually air). Interfacial tension, on the other hand, is the property between any two substances. It could be liquid-liquid, liquid-solid or solid-air.
Why adsorption takes place only at the interface?
Adsorption takes places only at the interface because it is a surface phenomenon that exists only at the base of the adsorbent. Since residual forces occur only on the surface when the environment is different on the interior of the bulk, the forces are acting in both directions, but not on the surface.
Which equation describes adsorption at the solid liquid interface?
As defined, N1 is equal to waqe/CA,0 = (Wqe)/(VCA,0). Thus, N1 is the ratio between the amount (kg) of adsorbate in the solid phase at equilibrium and that in the liquid phase dissolved initially (which is virtually the total amount of adsorbate in the whole system).
What do you understand by adsorption?
Adsorption is a mass transfer process that is a phenomenon of sorption of gases or solutes by solid or liquid surfaces. The adsorption on the solid surface is that the molecules or atoms on the solid surface have residual surface energy due to unbalanced forces.