SATHEE: Heat and Thermodynamics 5 Question 22

Heat and Thermodynamics 5 Question 22

23. $p - V$ plots for two gases during adiabatic processes are shown in the figure. Plots 1 and 2 should correspond respectively to

(2001, 2M)

(a) $H e$ and $O_{2}$

(b) $O_{2}$ and $H e$

(d) $O_{2}$ and $N_{2}$

Show Answer

Solution:

In adiabatic process

slope of $p - V$ graph, $\frac{d p}{d V} = - γ \frac{p}{V}$

$slope \propto γ$

(with negative sign)

From the given graph,

$(slope)_{2} > (slope)_{1}$

$∴ γ_{2} > γ_{1}$

Therefore, 1 should correspond to $O_{2} (γ = 1.4)$ and 2 should correspond to $H e (γ = 1.67)$ .

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Heat and Thermodynamics 5 Question 22

23. p−V plots for two gases during adiabatic processes are shown in the figure. Plots 1 and 2 should correspond respectively to

Solution:

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23. $p - V$ plots for two gases during adiabatic processes are shown in the figure. Plots 1 and 2 should correspond respectively to