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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermodynamics Laws & Specific Heats of GasesHard2 minQB

PhysicsHardmultiple choice

One gram mole of oxygen is in a cubical vessel of side 0.5 m at 400 K. Treat every molecule as moving at $v_{r m s}$ , one third along each axis. Which statements are correct?

Options:(select one or more)

Answer:

A, B, C

Solution:

$v_{r m s} = \frac{3 RT}{M} = 558$ m $s^{- 1}$ . A molecule moving along an axis hits a wall every $\frac{L}{v}$ s, so wall collisions per second = $\frac{N _{A} v}{L} = 6.72 \times 1 0^{26}$ . Stopping: $\frac{1}{2} M V^{2} = \frac{5}{2} R Δ T$ , so $V = \frac{5 R \times 3}{0.032} = 62.4$ m $s^{- 1}$ . D is ten times too large.

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

⏱ 2mℹ️ Source: QB

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