Question

which best compares the particles of the substance when it is in region 1 with the particles of the substance when it is in region 3?
the particles are slower in region 3.
the particles are more orderly in region 1.
the particles have more kinetic energy in region 1.
the particles have less freedom of motion in region 3.

Explanation:

In a phase - change diagram, region 1 is likely a solid phase where particles are in a more ordered arrangement and have less kinetic energy and freedom of motion compared to region 3 which is likely a liquid phase. In the liquid phase (region 3), particles are more disordered, have more kinetic energy and more freedom of motion than in the solid phase (region 1).

Answer:

The particles are more orderly in region 1.