Specific Weight

#183 / Thermo Easy

If the universal gas constant, R, is 8.314 kPa(m^3)/(kmol∙K), determine the specific gas constant for a gas that has a molecular weight of 40.

Expand Hint

$$$R_{i}=\frac{\bar{R}}{(mol.wt_i)}$$$

where $$\bar R$$ is the universal gas constant.

Hint 2

The units for a specific gas constant are in $$\frac{J}{kg\cdot K}$$ .

R is specific to each gas, but can be calculated from:

$$$R_{i}=\frac{\bar{R}}{(mol.wt_i)}$$$

where $$\bar R$$ is the universal gas constant.

$$$R_{specific}=\frac{8.314kPa(m^3)}{40(kmol\cdot K)}$$$

$$$R_{specific}=0.208\:\frac{kJ}{kg\cdot K}$$$

0.208 $$kJ/kg\cdot K$$

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