Why is solid a good conductor of heat?

Solids are good conductors of heat because their particles are closely packed together, allowing for efficient transfer of thermal energy through the material. When heat is applied to a solid, the particles vibrate more rapidly and collide with neighboring particles, transferring the heat energy throughout the material. Additionally, solids typically have strong bonds between their particles, which further facilitates the transfer of heat energy. This is why solids such as metals are known for their high thermal conductivity.

Solids are generally poor conductors of heat compared to liquids or gases. This is because in solids, the molecules are tightly packed and rigidly held in place by strong intermolecular forces. As a result, they cannot move freely and transfer energy as easily as they can in liquids or gases, where the molecules are more loosely spaced and mobile.