Chemistry - Ideal Gas Question with Solution | TestHub
ChemistryIdeal GasVapour PressureMedium2 minQB
ChemistryMediumsingle choice
Passage / Comprehension
A quantity of 3.6 kg liquid water is poured in an evacuated room of capacity 30 m³ maintained at 300 K. Assume ideal gas behaviour for water vapour. The vapour pressure of water at 300 K is 0.04 atm. (R = 0.08 l-atm/K-mol)
What percentage of liquid water will vaporize?
Options:
Answer:
A
Solution:
Vapour needed to saturate the room: n = PV/RT = 0.04 × 30000/(0.08 × 300) = 50 mol = 50 × 18 = 0.9 kg. Percentage vaporized = 0.9/3.6 × 100 = 25%. Hence (a).
Stream:JEESubject:ChemistryTopic:Ideal GasSubtopic:Vapour Pressure
⏱ 2mℹ️ Source: QB
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