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|    Message 54,322 of 55,615    |
|    =?UTF-8?B?TGlib3IgJ1BvdXRuaWsnIFN0x to All    |
|    Re: Pressure in aerosol cans    |
|    09 Feb 18 21:39:29    |
      From: poutnik@privacy.net              Dne 09/02/2018 v 20:14 rrhill04@gmail.com napsal(a):       > On Monday, February 8, 1999 at 12:00:00 AM UTC-8, Alan W. Messing wrote:       >> You could make an interesting, even relevant, problem by giving can       dimensions,       >> bursting pressure @ some temp., and adding a piece of dry ice before       sealing.       >> Lots of permutations -- empty can (no liquid), partially full can       (solubility of       >> CO2 in water), etc.       >>       >> Alan       >>       >> KBader wrote:       >>       >>> Anyone out there know the pressure in an "average" aerosol can, and at what       >>> pressure the average can will explode? I want to write an interesting gas       law       >>> problem for class so I only need approximate values. Thanks for any input.       >>>       >>> Ken Bader       >>> Conwell Egan Catholic High School       >>> Fairless Hills, PA       >>> Ken Bader       >>> Conwell Egan Catholic High School       >>> Fairless Hills, PA       >       > I just did an experiment with silly string and found pressure using ideal       gas law. Worked great. They calculated anywhere from 15 to 30 times atm.       >              As cans use liquidized gas under pressure       ( earlier freons, now propane+butane/isobutane mixture )       there is no way to properly apply ideal gas law.              Ideal gas can never become liquid,       as there is supposed no cohesive force between its molecules.              The pressure is determined by temperature,       growong exponentially, following exponential growth       of the partial pressure of the component vapours.                     --       Poutnik ( The Pilgrim, Der Wanderer )              A wise man guards words he says,       as they say about him more,       than he says about the subject.              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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