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A compressed gas cylinder of H2 containing 25 l at 200,000 kPa of pressure is emptied due a leak in a gas chromatography laboratory, with the following dimensions: 5 m long, 4 meters wide and 2.5 m height. Calculate the % oxygen and hydrogen in the atmosphere of the laboratory after the leak. If the lower explosive limit (LEL) of H2 is 4%, is there a risk of explosion? Taking into account the apparent volume of gas once expanded.
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Posted: 13 years ago
The volume of the laboratory is 50 m3
The volume of H2 at 100 kPa is 50 m3
The total presure after the leak will be 200 kPa
The O2 volume at 200 kPa will be 10,5 m3
The H2 volume at 200 kPa will be 25 m3
The % of H2 is 25*100/10,5 = 238 %
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Posted: 13 years ago
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