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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermodynamics Laws & Specific Heats of GasesMedium2 minQB

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The atomic weight of chlorine is 35.5. In a tube of chlorine gas at 350 K a standing wave of frequency 1000 Hz has nodes 11.98 cm apart. Is the gas monoatomic or diatomic ( $R = 8.314$ )?

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Answer:

Solution:

$λ = 2 \times 11.98 = 23.96$ cm, $v = f λ = 239.6$ m $s^{- 1}$ . $γ = \frac{v ^{2} M}{RT}$ . For atoms ( $M = 0.0355$ ): $γ = 0.70$ , impossible. For molecules ( $M = 0.071$ ): $γ = \frac{57410 \times 0.071}{8.314 \times 350} = 1.40$ , so the gas is diatomic.

Subject:PhysicsTopic:Heat & ThermoSubtopic:Thermodynamics Laws & Specific Heats of Gases

⏱ 2mℹ️ Source: QB

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