Specific gas constant

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The specific gas constant of a gas is given by the universal gas constant, divided by the molar mass of the gas.

Contents

Definition

Let:

[ R \ ]be the universal gas constant, or about [ 8.314472 } \ ]

[ r \ ]be the specific gas constant for the gas you are working with

[ M \ ]be the molar mass of the gas

So then:

[ r = } \ ] -or rewritten as- [ R = rM \ ]

The molar mass of helium is:

[ 4.003}]

Therefore, the specific gas constant of helium is:

[}}} }} \approx 2.077 }\ ]

The generally accepted molar mass of air is:

[ 28.97}]

Therefore, the specific gas constant of air is:

[}}} }} \approx .287 }\ ]

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