Equations..

[atsakiri at ford.com]

> PV=mRT, where

I prefer that form too.  Engineers seem to use m (mass), chemists
seem to use n (moles).  Either works as long as you keep track of 
the universal gas constant units.  The notation I've seen includes
a bar over the R for the molar version.

       _
   R = R/M   where M is a gases molecular mass  (about 29 for air)


> R=287 kJ/(K * kg) for air

  There may be a factor of 1000 problem here.  Someone please
  check the following math!
  _
  R = 8.3 J/(mole*K)
      _
  R = R/M = { 8.3 J/(mole*K) } / { 29 g/mole }  = 0.287 J/(g*K)
                                                = 0.287 kJ/(kg*K)


> Hey, glad to see a high school student trying stuff like this.

Yes, me too.  Keep at it.


Anthony Tsakiris  


Notation:

 P = pressure
 V = cylinder volume
 R = gas constant for a specific gas
 _
 R = universal gas constant
 T = absolute temperature
 M = molecular mass

---------------------------------------------------------------------------
The opinions expressed are my own and not necessarily those of my employer.