Chemistry - Ideal Gas Question with Solution | TestHub

ChemistryIdeal GasKinetic Theory of GasesHard2 minQB

ChemistryHardnumerical

Find the average speed of helium atoms at $2 7^{\circ} C$ in km/s. (R = 8.314 J/mol K, molar mass of He = 0.004 kg/mol, π = 3.14, $1.5885 = 1.260$ )

Give the answer correct to two decimal places.

Answer:

1.26

Solution:

$u_{a vg} = 8 RT / π M = 8 \times 8.314 \times 300/ (3.14 \times 0.004)$ .

Numerator = 19953.6. Denominator = 0.01256. Ratio = $1.5885 \times 1 0^{6}$ .

$u_{a vg} = 1000 \times 1.5885 = 1260 m / s = 1.26 km / s$ .

Answer: 1.26.

Stream:JEESubject:ChemistryTopic:Ideal GasSubtopic:Kinetic Theory of Gases

⏱ 2mℹ️ Source: QB

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