First slide

Thermodynamic processes

Question

Adiabatic modulus of elasticity of a gas is $2.8 \times 10^{5} N / m^{2}$ . What will be its isothermal modulus of elasticity. Given $\frac{C_{P}}{C_{V}} = 1.4_______$

Moderate

A

$1.5 \times 10^{5} N / m^{2}$
B

$1.4 \times 10^{5} N / m^{2}$
C

$3 \times 10^{5} N / m^{2}$
D

$2 \times 10^{5} N / m^{2}$

Solution

$\begin{array}{l} γ = \frac{Adiabatic mod u l u s}{Isothermal mod ulus} \\ isothermal mod ulus = \frac{Adibatic mod u l u s}{γ} \\ = \frac{2.8 \times 10^{5}}{1.4} \\ = 2 \times 10^{5} N / m^{2} \end{array}$

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