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will a large capictator split water i a second?


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#1 Trapshooter117

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Posted 4 March 2011 - 05:26 PM

Hello,

ok for a physics project i have to design a launcher that gets all power from a 1 farad capictator at 13.8 volts. i want to know if the capictatior can split a ml of water into oxygen and hydrogen gas and the ignite the whole messs again? any help would be much appreciated.

ok i did the energy conversion for the capictator and i get 95.22 joules and if the system was 100% efficent then it would take 121 joules to split a ml so atr most i could split .5 ml of water but would the explosion be enough to propell a .25 inch by .5 inch rod?
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#2 John Cuthber

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Posted 4 March 2011 - 06:18 PM

The heat of combustion of hydrogen is near 300 KJ/mol and that's the reaction you are seeking to undo.
A mole of hydrogen will give 18 ml of water so each ml will need about 17KJ
Your 95J will split about 0.006 ml. You seem to have miscalculated something.
It gets worse.
The capacitor has a charge of 13.8 Coulombs; that's enough electrons to neutralise the charge on about .00015 moles of H+ ions and will generate half that many moles of H2. In doing so it will split just 0.0013 ml of water and form about 3 ml of gas.

As for "would the explosion be enough to propell a .25 inch by .5 inch rod? "
Well, not very far.
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#3 Schrödinger's hat

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Posted 6 March 2011 - 11:19 AM

Have you thought about a coil gun or rail gun?

A solenoid may be a simple way to use the same concept, although you'll be accelerating more mass.
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#4 Trapshooter117

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Posted 1 May 2011 - 06:51 PM

OK so i switched tracks and have decided to use the coil gun design. i made a small coil but it has too much Resistance and the magnetic Field lasts too long so it sucks the magnet in but doesn't let it keep traveling it just stops right in the center of the solenoid. so my question is this is there anyone who knows how to design a coil that uses 22 Gage magnet wire that will be powered by a 1 farad capacitor to launch a .188 by .511 in iron cylinder. i can't find anything on-line about coil geometry other than trial and error and think that there has to be a better way to accomplish this. i know that the coil would have to be the same length as the projectile but i don't know how many layers i need of how many turns that would be. thank you for your time and your previous help.
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#5 boogieman

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Posted 2 May 2011 - 04:40 PM

i can't find anything on-line about coil geometry other than trial and error and think that there has to be a better way to accomplish this.


Go take a look at this site

http://www.instructa...oilgun-Handgun/

lots of other links there, including THIS one : http://www.instructa...The-0-Coil-Gun/


REMEMBER : these are NOT toys and can kill and maim.

regards
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