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sir explain me surface chemistry

sir explain me surface chemistry

Grade:12

2 Answers

Nishant Vora IIT Patna
askIITians Faculty 2467 Points
8 years ago
Dear student,

Suraface Chemistry
the branch of chemistry concerned with the processes occurring at interfaces between phases, especially that between liquid and gas.
Avinash
askIITians Faculty 1241 Points
8 years ago
Surface chemistrydeals with the study of phenomena that occur at the surfaces or interfaces of substances, like adsorption, heterogeneous catalysis, formation of colloids, corrosion, crystallization, dissolution, electrode processes, chromatography etc. Surface chemistry finds its applications in industry as well as in daily life.

The physical boundary of any condensed phase like liquid or solid is considered as surface. It separates one phase from the other. It can be considered as series of points which make a plane or layer where one phase ends and the other begins. The surface may be uni-layered or multi-layered.The atoms at the surface show unique properties that are different from those of atoms in the bulk due to unbalanced forces of attraction which are otherwise known asresidual forces.

The atoms in the bulk are surrounded in all directions and hence the forces of attraction are balanced. However the forces of attraction at the surface are unbalanced since they are only attracted from inside. The forces of attraction acting outside are not balanced and hence are known as residual forces, which give unique properties to the surface.
Systems try to minimize this unfavorable free energy at the surfaces, otherwise known as surface tension, in following ways.

i) By reducing the surface area.

ii) By altering the spatial arrangement of particles at the surface.

iii) By making attractions with particles of other systems.

Most of surface chemistry involves the interaction of surfaces of one system with the particles of other system. Surfaces play active role in catalysis, colloid formation, electrode reactions, chromatography etc. In the current chapter we deal with the surface phenomena and related topics like:

1) Adsorption

2) Catalysis

3) Colloids



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