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Effects on boiling point, viscosity and surface tension

Chemistry • Intermolecular Forces • Original Scenario-Based • 1 questions

Effects on boiling point, viscosity and surface tension Original Scenario-Based Download PDF

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

1 Chemistry practice questions on Effects on boiling point, viscosity and surface tension. Questions built around original scenarios.

Questions

  1. 1.

    A planetary exploration team on an orbital laboratory evaluates three synthetic coolants of comparable molar mass: Cryo-A (nonpolar, interacting solely through London dispersion forces), Cryo-B (polar, dominated by dipole-dipole interactions), and Cryo-C (containing multiple hydroxyl groups capable of forming hydrogen bonds). To safely calibrate the spacecraft fluid lines and radiator panels, the engineers must evaluate how these molecular interactions dictate macroscopic behavior. Based on the relative strengths of their intermolecular forces, which prediction regarding their bulk physical properties is correct?

    • A) Cryo-A exhibits the highest boiling point and greatest surface tension because nonpolar dispersion forces form the most rigid cohesive networks.
    • B) Cryo-C exhibits the highest boiling point, greatest viscosity, and highest surface tension because extensive hydrogen bonding provides the strongest intermolecular attractions.
    • C) Cryo-B exhibits a higher surface tension than Cryo-C, while Cryo-A displays the highest viscosity due to transient induced dipoles.
    • D) Cryo-C exhibits the lowest viscosity and lowest boiling point because hydrogen bonding allows adjacent molecular layers to slide past one another with minimal resistance.