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  4. The ratio of adiabatic to isothermal elasticity of a diatomic gas is

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Q. The ratio of adiabatic to isothermal elasticity of a diatomic gas is

Mechanical Properties of Solids

Solution:

$K_{\text {isothermal }}=\text { Pressure of gas }(P)$
$K_{\text {adiabatic }}=\gamma \times \text { pressure of gas }(\gamma \cdot P) $
Ratio $=\frac{\gamma P}{P}=\gamma$
$\gamma$ of diatomic gas $=\frac{7}{5}=1.4$