Question

The ratio of two specific heats of gas $C_p/C_V$ for argon s $1.6$ and for hydrogen is 1.4. Adiabatic elasticity of argon at pressure $p$ is $E.$ Adiabatic elasticity of hydrogen will also be equal to $E$ at the pressure

• A. p
• B. $\frac{8}{7}p$
• C. $\frac{7}{8}p$
• D. 1.4 p

Answer 1

Answer: (B)

Adiabatic elasticity $E=\gamma p$
For argon $E_{Ar}=1.6p$
For hydrogen $E_{H_2}=1.4p^{\prime }$
As elasticity of hydrogen and argon are equal
$\therefore 1.6p=1.4p^{\prime }$
$\Rightarrow p^{\prime }=\frac{8}{7}p$