Equations..
atsakiri at ford.com
atsakiri at ford.com
Thu Mar 7 16:00:38 GMT 1996
> 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
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