From: jimdavis2@earthlink.net   
      
   iain-3@truecircuits.com wrote:   
      
   > The JANAF heat of formation for C is 711.2 kJ/mol.  That's a lot.   
   >   
   > If I do the simple heat of formation at 0 K equation for a   
   > hydrogen-oxygen rocket, I get:   
   >   
   > H2 + 0.5*O2 -> H20 + 238.9 kJ/mol  (= 13.27 kJ/g)   
   >   
   > If I do the same equation for a carbon monoxide rocket, I get:   
   >   
   > C + 0.5*O2 -> CO + 825.0 kJ/mol    (= 29.45 kJ/g)   
   >   
   > That's a lot better!   
   >   
   > I haven't heard of this before, so I'm probably screwing up.   
   > Can anyone suggest where I'm screwing up?   
      
   You're using the heat of formation of carbon *gas*, not graphite.   
   Graphite has a heat of formation of 0.   
      
   Jim Davis   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)