What is water gas?How is it prepared?give one method to separate hydrogen gas from water gas
Answers
BY COKE AND STEAM PROCESS: When super heated is passed over red hot coke, a mixture of carbon monoxide and hydrogen is obtained which is known as water gas. BY THE ELECTROLYSIS OF WATER: When pure water containing a little amount of H2SO4 or any ionic salt is electrolyzed, pure hydrogen is obtained.
One of the easiest ways to obtain hydrogen is to get it from water, H2O. This method employs electrolysis, which breaks water into hydrogen and oxygen gas. Unbend the paperclips and connect one to each terminal of the battery.
Hydrogen gas can be prepared by a lot of methods. Some important are as under.
BY THERMAL DECOMPOSITION OF METHANE:
When natural gas is heated up to 1000oC in the presence of catalyst, hydrogen gas is obtained.
CH4 ®C + 2H2
BY COKE AND STEAM PROCESS:
When super heated is passed over red hot coke, a mixture of carbon monoxide and hydrogen is obtained which is known as water gas.
C + H2O ®CO + H2
By liquefication method pure hydrogen is separated.
BY THE ELECTROLYSIS OF WATER:
When pure water containing a little amount of H2SO4 or any ionic salt is electrolyzed, pure hydrogen is obtained.
LANE’S METHOD:
When steam is passed over red hot iron, hydrogen gas is obtained.
3Fe + 4H2O ®Fe3O4 + 4H2
BY THE THERMAL DECOMPOSITION OF AMMONIA:
When ammonia gas is strongly heated it decomposes in to nitrogen and hydrogen.
2NH3 ® N2 + 3H2
N2 gas is separated by liquefication method.