Physics

Specific Gas Constant Calculator

Find the specific gas constant from molar mass.

Calculated Output

Specific gas constant (J/(kg·K)) 287

Formula: R_specific = R ÷ M

Step-by-Step Breakdown

1. Values used:

2. Molar mass = 28.97 g/mol

4. Specific gas constant = 287J/(kg·K)

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The math behind it

R_specific = R ÷ M (M in kg/mol). It lets you use PV = mR_specific·T with mass instead of moles.

Air (28.97 g/mol) → about 287 J/(kg·K).

Why per gas?

Each gas has its own molar mass, so its specific constant differs.