Question

Neon, Argon, and Oxygen. Start with a temperature at which these substances are solids and slowly increase the temperature but do not reach the melting point. What can be said about the relationship between the temperature of a solid and the motion that the solid has?

Answer 1

In a solid the molecules are not free to move. But as the temperature increases the molecules start vibrating from their mean position.As a result there is a linear,superfacial and volume expansion of the solid.At low temperature the molecules in solid are in low energy state.At absolute zero their oscillating motion ceases to exist.As the temperaure increases their vibratory motion and kinetic energy increases but not leaving their position until their boiling point comes.