Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoKTGMedium2 minQB

PhysicsMediummultiple choice

Select the correct statement(s) :

Options:(select one or more)

Answer:

A, C, D

Solution:

$v_{r m s} = \frac{3 RT}{M} = \frac{3 ( 8.314 ) ( 300 )}{0.032} \approx 484 m/s$

(independent of the 8 g mass). (A) true, (B) false.

$v_{r m s}^{2} - \overset{v}{ˉ}^{2} = \frac{1}{n} i \sum (v_{i} - \overset{v}{ˉ})^{2} \geq 0$

Equality holds only when every molecule has the same speed; for more than one molecule with unequal speeds, $v_{r m s} > \overset{v}{ˉ}$ . Statement (C) takes the speeds to be unequal. (C) true.

Real gases approach ideal behaviour at low pressure and high temperature. (D) true.

Stream:JEESubject:PhysicsTopic:Heat & ThermoSubtopic:KTG

⏱ 2mℹ️ Source: QB

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