Define the following: Evaporation

Define the following: Latent heat of vaporization.

Give reason for the following: 

The smell of hot sizzling food reaches us several meters away but to get the smell from cold food you have to go close.

Give a reason for the following:

Naphthalene ball disappears without leaving any solid.

Give the reason for following:

We can easily move our hand in air but to do the same through a solid block of wood or brick, we need a karate expert.

Compare the three states of matter in terms of compressibility.

Compare the three states of matter in terms of density.

Compare the three states of matter in terms of energy of molecules.

Explain the following:

Our palm feels cool when we put some acetone on it.