WHAT IS THERMITE PROCESS?

THERMITE PROCESS:
Reduction of metal oxides by aluminum is called thermite process. In this process a huge amount of heat is liberated which causes a temperature up to 3000oC. Due to this reason thermite process is used for welding of broken metal parts.
2Al + Fe2O3 ® Al2O3 + 2Fe + Heat 
WHAT IS PLASTER OF PARIS? HOW IT IS PREPARED? WRITE ITS PROPERTIES?
 CHEMICAL NAME: Calcium Sulphate Hemi Hydrated
CHEMICAL FORMULA: CaSO4.1/2H2O or (CaSO4)2.H2O
COMMERCIAL NAME: Plaster Of Paris

METHOD OF PREPARATION:
When gypsum is heated to 100oC, it loses water molecules to produce plaster of Paris.
2(CaSO4.2H2O) ® (CaSO4)2.H2O + 3H2O
PROPERTIES
When plaster of Paris is ground to fine powder and mixed hard forming gypsum again. The setting results with expansion so the plaster of Paris fits tightly in to mold.
FOR MORE DETAILS CLICK HERE
    For latest information , free computer courses and high impact notes visit : www.citycollegiate.com
|PHOTOSHOP|FLASH|SWISH|FLAX|INTERNET|PHYSICS|CHEMISTRY|HOME|