Question

Now slowly add heat to the sample of ice but do pass a temperature of 0 °C. What happens to the motion of the molecules as the temperature increases? Describe the changes in the motion in terms of the type of motion and the randomness of the water molecules motion.

Make a conclusion. Try the other substances, which are 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 temperature of a solid and the motion that the solid has?

Answer 1

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The motion of molecules increase as the temperature increases.In the solid state of water the molecule consisting would have only vibratory motion.But on heating the molecules will be more free to move so the randomness of the molecule also increases. For inert gases also the motion of molecules increase  since the internal structure of the solid changes on increasing temperature. And the total internal energy of the substance increases so the kinetic energy of the molecule also increases. So we can say that the temperature of the solid is directly proportional to the motion or the velocity of the molecules.