during which changes of state do atoms that cannot move past one another become free to move?\n vaporization…

during which changes of state do atoms that cannot move past one another become free to move?\n vaporization and sublimation\n boiling and deposition\n sublimation and melting\n condensation and melting

during which changes of state do atoms that cannot move past one another become free to move?\n vaporization and sublimation\n boiling and deposition\n sublimation and melting\n condensation and melting

Answer

Brief Explanations:

  1. First, recall the states of matter and particle movement: In a solid, atoms are closely packed and can't move past each other. In liquids, they can slide past, and in gases, they move freely.
  2. Analyze each change:
    • Sublimation: Solid (atoms fixed) to gas (atoms free) – atoms become free.
    • Melting: Solid (atoms fixed) to liquid (atoms can slide) – atoms become free to move past.
    • Vaporization: Liquid to gas – but liquid atoms can already move past, so not starting from "cannot move past".
    • Deposition: Gas to solid – atoms become less free.
    • Condensation: Gas to liquid – atoms become less free.
    • Boiling: Liquid to gas – liquid atoms can move past, so not starting from "cannot move past".
  3. So sublimation (solid→gas) and melting (solid→liquid) involve atoms moving from a state (solid) where they can't move past to one where they can (liquid or gas).

Answer:

C. sublimation and melting