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Characteristic Gas Equation

  • Writer: Admin
    Admin
  • Jul 19, 2020
  • 1 min read

Updated: Jul 20, 2020

We know that General Gas Equation is

(P1V1)­/T1 = (P2V2)/T­2 = CONSTANT


When the constant of general gas equation is replaced by a term mR then the equation formed becomes characteristic gas equation.


Therefore PV/T = C

PV/T = mR

PV = mRT

Where R = Gas Constant (Its value is different for different gases)

m = mass of gas


The value of R varies from gas to gas and for atmospheric air its value is 287 J/Kg.K


Unit of R


R = PV/mT

R= ( Nm-2×m3)/Kg×K

R = Nm/Kg×K

R = J/Kg.K

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