Ücretsiz Kullanmaya Başla

Changes of state at the particle level Transitional Reasoning Practice

Chemistry · Matter · Chemistry · Particle Model of Matter

1 Chemistry practice questions on Changes of state at the particle level. Questions that build towards applied reasoning.

Layout:

Choose how questions appear in the preview and test.

Preview the questions below, then start to answer and see your results.

Questions

  1. 1.

    A student places 10.0 g of liquid acetone into an airtight, flexible pouch, removes all excess air, and seals it. When the pouch is placed into a warm water bath, the liquid completely vaporises, causing the pouch to inflate into a large gas-filled volume while the total mass remains exactly 10.0 g. Based on the particle model of matter, which statement correctly explains these observations at the submicroscopic level?

    • A) The average distance between particles increases dramatically as intermolecular forces are overcome, while the total number and mass of individual particles remain constant.
    • B) The individual acetone particles expand in volume because thermal energy causes each molecule to swell, thereby increasing the macroscopic volume.
    • C) The covalent bonds within the acetone molecules break apart, dividing each molecule into multiple gaseous atoms that take up more room.
    • D) Thermal energy converts directly into additional acetone particles during the phase change, forcing the walls of the pouch outward.

Answers and step-by-step solutions appear after you finish the test.