A solid begins to melt when?
A
constituent particles acquires a greater kinetic energy
B
energy of vibration of particles of the solid is less than the intermolecular forces
C
constituent particles acquires energy above the average kinetic energy
D
energy of vibration of particles of the solid equals the intermolecular forces
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
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.
Source: WAEC / JAMB / NECO Classroom Archive (Record #13871)