Author Topic: How much gas from 1 litre ?  (Read 7380 times)

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How much gas from 1 litre ?
« on: October 13, 2010, 17:24:19 pm »
Hello , im trying to find out how much gas you can get from 1litre of water . I read it somewhere a while ago but cant find it . Anyone know ?
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John

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Re: How much gas from 1 litre ?
« Reply #1 on: October 13, 2010, 17:33:26 pm »
20°C, 1atm pressure:
2024 cm³/g = 2024liters gas per kilogram/liter water.

molar mass water: 18.05 g/mol
=> 55.4 mol/kg

1 mol water -> 1.5 mol H2 + O2
universal gas law: 1.5 * 55.4 * 8.314 * 293 / 105 m3 = 2.024 m3 = 2024 l
« Last Edit: October 13, 2010, 18:05:57 pm by haithar »

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Re: How much gas from 1 litre ?
« Reply #2 on: October 13, 2010, 17:51:33 pm »
in my numbers i have 1847 liters stp




if you calculate this from 22,4 liters per mole of gas as 1 liter of water will liberate 55,51 moles of H2 and 27,755 moles of O2 you have 83,265 * 22,4 = 1865 liters at stp



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Re: How much gas from 1 litre ?
« Reply #3 on: October 13, 2010, 18:17:30 pm »
1 liter = 1 kg H20 = 1000 g H2O (because Density of Water = 1000 g/liter)


H = 1.01 g/mole (from periodic table)
O = 16.00 g/mole (from periodic table) (mol or mole is just a number, or quantity, if you wanted to count all the atoms that make a gram)


H2O = 18.02 g/mol


1000 g H2O / 18.02 g/mol = 55.5 moles of H20


H2O ---> (1/2)O2 + H2 [balanced chemical equation, excluding energy input]
55.5 ---> (1/2)55.5 + 55.5 [moles]
1000 g ---> 27.7 moles*32.00 g/mole + 55.5 moles*2.02 g/mole [grams]


Thus...


1000 g H2O ---> 886.4 g O2 + 112.1 g H2 (rounded)


if you did this calculation for gasoline, then you would find water has about 2.5x the amount of hydrogen (by mass or volume, i am not sure, because 1 liter of gasoline does not have the same mass as 1 liter of water, gasoline is lighter than water) ... meaning [1000 g *?or?* 1 liter] of gasoline has 44.84 grams of Hydrogen


so we have the mass of the gas from the separated water, if you want volume you have to know the density


Volume = Mass / Density
 
your density depends on pressure, I don't have the figures for that


A rough figure I know of is that it expands 1860 times when separated, so 1 liter of water = 1860 liters of gas, i think at 1 atm pressure


if your cell has a fixed volume, then density will increase with pressure


the exact calculations ca be done, you just have to get the right figures to start with and determine exactly what your situation is, for what you want to find out


provide more information on your question and i can look up some more exact values and try and do the exact calculations...

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Re: How much gas from 1 litre ?
« Reply #4 on: October 13, 2010, 18:22:01 pm »
haithar, universal gas law only applies if a hydrogen and oxygen and air gas mixture is considered an ideal gas


is it an ideal gas? i never ventured to determine if it was or not, yet...


some experiments could be done to compare it to steam, or air, and we have all the values from the steam tables and air tables, in the back of any thermodynamics textbook, they may be close but so far i think they will be slightly different

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Re: How much gas from 1 litre ?
« Reply #5 on: October 13, 2010, 21:15:17 pm »
Many thanks for the reply's . Im off on holiday tomorrow , but when i   come back im going to have a go at replicating scott cramtons cell .   Apparantly he is getting 6lpm @1 amp pulsing an alternator . Its   constructed the same as meyers demo cell with the slots to make the tube   pairs resonate .
If i can generate 6lpm it should be enough to run a petrol generator ...... happy days .

There   are construction plans on Patric Kelly's site if anyone is interested .   The site is well worth looking at if you have an interest in free   energy :
http://www.free-energy-info.co.uk/

http://www.free-energy-info.co.uk/Chapter10.pdf           scott cramton design starts on page 39

John

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Re: How much gas from 1 litre ?
« Reply #6 on: October 13, 2010, 21:18:44 pm »
Many thanks for the reply's . Im off on holiday tomorrow , but when i   come back im going to have a go at replicating scott cramtons cell .   Apparantly he is getting 6lpm @1 amp pulsing an alternator . Its   constructed the same as meyers demo cell with the slots to make the tube   pairs resonate .
  If i can generate 6lpm it should be enough to run a petrol generator ...... happy days .

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Re: How much gas from 1 litre ?
« Reply #7 on: October 13, 2010, 21:22:05 pm »
haithar, universal gas law only applies if a hydrogen and oxygen and air gas mixture is considered an ideal gas


is it an ideal gas? i never ventured to determine if it was or not, yet...


some experiments could be done to compare it to steam, or air, and we have all the values from the steam tables and air tables, in the back of any thermodynamics textbook, they may be close but so far i think they will be slightly different
the results are more or less accurate nevertheless and i'd think better than "A rough figure I know" ;)