Chemistry - Ideal Gas Question with Solution | TestHub
ChemistryIdeal GasKinetic Theory of GasesMedium2 minQB
ChemistryMediumstatement
Statement 1: The average speed of gas molecules decreases with the increase in molar mass of gas at constant temperature.
Statement 2: The average kinetic energy per mole of all the gases is same, independent of their molar masses.
Options:
Answer:
A
Solution:
Average KE per mole = 3/2RT, the same for every gas at a given T — Statement 2 is correct. Since 1/2Mbarv2 (per mole) is fixed, barv = √(8RT/π M) ∝ 1/√(M), so heavier gases move more slowly — Statement 1 is correct, and it follows directly from the constancy of KE in II. Ans: (a).
Stream:JEESubject:ChemistryTopic:Ideal GasSubtopic:Kinetic Theory of Gases
⏱ 2mℹ️ Source: QB
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