Since, each vibrational mode, corresponds to two degrees of freedom, hence, f=3(trans.)+3(rot.)+8(vib.)=14
&\gamma =1+\frac{2}{f}
γ=1+142=78
W=γ−1nRΔT=−582
As W<0. work is done on the gas.
One mole of an ideal gas is taken through an adiabatic process where the temperature rises from 27°C to 37°C. If the ideal gas is composed of…
JEE Main 2021 — Physics Thermodynamics
2021mcqhard
One mole of an ideal gas is taken through an adiabatic process where the temperature rises from 27∘C to 37∘C. If the ideal gas is composed of polyatomic molecule that has 4 vibrational modes, which of the following is true? [R=8.314Jmol−1k−1]
Official previous-year question
Held on 27 Jul 2021 · Verified 6 Jul 2026.
Options
- A
work done by the gas is close to 332J
- B
work done on the gas is close to 582J
- C
work done by the gas is close to 582J
- D
work done on the gas is close to 332J
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