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JIPMER 2017
Exam
JIPMER
Year
2017
Subject
Physics
Chapter
Thermodynamics

JIPMER 2017 · Physics · Thermodynamics

p-V plots for two gases during adiabatic process as shown in figure...

p−Vp-V plots for two gases during adiabatic process as shown in figure plots 1 and 2 should correspond respectively to p-V plots for two gases during adiabatic process as shown in figure plots 1 and 2 should correspond respectively to

Options

  1. AHe and O2\mathrm{O}_2
  2. BO2\mathrm{O}_2 and He
  3. CHe and Ar
  4. DO2\mathrm{O}_2 and N2\mathrm{N}_2

Correct answer

B. O2\mathrm{O}_2 and He

Step-by-step solution

Slope of adiabatic process of p−Vp-V diagram (dpdv)=γpV i.e. slope αγ\left(\frac{d p}{d v}\right)=\gamma \frac{p}{V} \text{ i.e. slope } \alpha \gamma From graph ( slope )2>(\text{ slope })_2> (slope) )1⇒γ2>γ1γ)_1 \Rightarrow \gamma_2>\gamma_1 \gamma for monoatomic gas (Ar, He) is greater than γ\gamma for diatomic gas (O2,N2)\left(\mathrm{O}_2, \mathrm{ N}_2\right)
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