A solid begins to melt when?
- constituent particles acquires a greater kinetic energy
- energy of vibration of particles of the solid is less than the intermolecular forces
- constituent particles acquires energy above the average kinetic energy
-
energy of vibration of particles of the solid equals the intermolecular forces
The correct answer is: D
Explanation
When a solid is heated, the particles are given more energy and start to vibrate faster.
At a certain temperature, the particles vibrate so much that their ordered structure breaks down.
At this point the solid melts into liquid.