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Specific Gas Constant Calculator

Insert the values and hit on calculate button to find the specific gas constant.

kg/kmol

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Specific Gas Constant Calculator

Specific gas constant calculator is used to find the specific gas constant (R) for a specific gas.

What is a specific gas constant?

A physical constant known as the particular gas constant, represented by the letter R, links a gas's characteristics to its temperature, pressure, and molecular weight. Depending on the measuring unit, the particular gas constant has a different value. The specific gas constant is often used in the ideal gas law, which describes the behavior of an ideal gas.

S = R / MW

Where

  • R = Universal Gas Constant = 8314 J/kmol-K.

What is molecular weight?

The molecular weight is an important parameter in chemistry and physics because it provides information about the composition of a substance. It helps determine the number of moles of a substance based on its mass and vice versa.

The molecular weight is used in various calculations, including stoichiometry, molar volume calculations, and gas law equations. It is particularly relevant when working with gases because it allows for the conversion between molar mass and moles of a gas.

In mathematical form, it is written as:

MW = R/S

Where

  • R = Universal Gas Constant = 8314 J/kmol-K.

Examples

Example 1:

Determine the Specific gas Constant if

Molecular Weight (MW) = 25 kg/kmol

Solution

Step 1:

The formula for the specific gas constant

S = R / MW

Step 2:

Put the value of R = 8314 J/ kmol-kelvin.

S = 8314 / 25

Specific Gas Constant(S) = 332.56 J/kg-K

Example 2:

Determine the Specific gas Constant if

Molecular Weight (MW) = 60 kg/kmol

Solution

Step 1:

The formula for the specific gas constant

S = R / MW

Step 2:

Put the value of R = 8314 J/ kmol-kelvin.

S = 8314 /60

Specific Gas Constant(S) = 138.56 J/kg-K

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