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Vapor pressure Original Scenario-Based Practice

Chemistry · States of Matter & Solutions · Chemistry · Intermolecular Forces

1 Chemistry practice questions on Vapor pressure. Questions built around original scenarios.

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Questions

  1. 1.

    In an orbital bio-dome maintained at a constant 298 K, an environmental engineer monitors two volatile cooling liquids, Hydron (which forms strong intermolecular hydrogen bonds) and Aerin (which exhibits only weak London dispersion forces), each sealed in separate evacuated chambers containing excess liquid. After dynamic equilibrium is established, the engineer doubles the surface area of both liquid pools without altering the temperature or chamber volume. How do the equilibrium vapor pressures of the two liquids compare before and after this modification?

    • A) Hydron maintains a higher equilibrium vapor pressure than Aerin because strong hydrogen bonds drive more molecules into the vapor phase, and both vapor pressures increase when surface area expands.
    • B) Aerin initially has a higher equilibrium vapor pressure than Hydron, but doubling the surface area causes the equilibrium vapor pressure of both liquids to double.
    • C) Both liquids attain identical equilibrium vapor pressures after the modification because increasing surface area equalizes the evaporation rates regardless of intermolecular force strength.
    • D) Aerin maintains a higher equilibrium vapor pressure than Hydron throughout, and the equilibrium vapor pressure of neither liquid changes when the surface area is doubled.

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