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Haber n Contact process HELP in chem!

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can someone plz xplain the haber n contact process in a simple but understandable form??! (step by step) thanx. :)
 
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CONTACT PROCESS

this is the manufacture of sulphuric acid on a large scale.
sulphuric acid is obtained from sulphur and oxygen as its raw materials.
Sulphur is found in underground sulphur beds in the US, from natural gas and petroleum and metal sulphides.
The major use of sulphur is to provide sulphur dioxide in the contact process.

TO MANUFACTURE SULPHURIC ACID:
-SULPHUR IS BURNT IN AIR TO FORM SULPHUR DIOXUDE
-SULPHUR DIOXIDE IS MIXED WITH OXYGEN TO FORM SULPHUR TRIOXIDE
conditions for the reaction: cataclyst canadiumm (v) oxide, temp of 450degrees, & atmospheric pressure of 230 ATM.
-THE REACTION BETWEEN SULPHUR TRIOXIDE AND WATER IS TOO VIOLENT & SO SULPHUR TRIOXIDE IS DISSOLVED IN conc. H2SO4 TO FORM OLEUM: H2S207
-WATER IS THEN ADDED TO THE OLEUM TO FORM SU;PHURIC ACID.

USES OF SULPHURIC ACID:
-FOR MAKING FERTILISERS
-USED AS A PRESERVATIVE
-USED AS A BLEACHING AGENT
hope u understand..!
 
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