No, the volume does not change when a solid is converted to a liquid under normal conditions. The process of converting a solid to a liquid is known as melting or fusion, and it occurs at a specific temperature called the melting point.
During melting, the solid absorbs heat energy, which increases the kinetic energy of its particles. As a result, the particles gain enough energy to overcome the forces holding them in a fixed position within the solid lattice structure. This causes the solid to transition into a liquid state.
While the arrangement of particles in a solid is usually ordered and closely packed, in a liquid state, the particles are more loosely arranged and have greater freedom of movement. However, the overall volume of the substance remains nearly constant during this phase transition.
It's important to note that there are exceptions to this general rule. For instance, substances with anomalous behavior, such as water, exhibit a slight increase in volume upon freezing. But for most substances, the volume remains relatively constant during the conversion from a solid to a liquid.