First slide

Gaseous state

Question

Indicate the correct statement for equal volumes of N₂(g) and CO₂(g) at 25°C and 1 atm.

Moderate

A

The average translational K.E. per molecule is the same for N₂ and CO₂
B

The rms speed is same for both N₂ and CO₂
C

The density of N₂ is less than that of CO₂
D

RMS velocity of N₂ is more than RMS velocity of CO₂

Solution

$\begin{array}{l} KE = \frac{3}{2} RT (1 mole) U_{r m s} = \sqrt{\frac{3 RT}{M_{w}}} \\ d = \frac{{PM}_{w}}{RT} \end{array}$

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