Question

How is water different from water vapor in terms of molecular arrangement?

Answer 1

Well, H₂O(l) is a liquid in which molecules are loosely packed in contrast to solids.
On the other hand, H₂O(g) or water vapour is in gasesous state in which the molecule force of attraction is least, viz. very loose.

Molecular Arrangement
Solids > Liquids > Gases

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Answer 2

When heat energy is supplied to ice it changes into water and then to vapor. If we cool the steam it gets converted into water and further cooling of water changes into ice.
Here the heat energy is used up in changing the state of matter. the heat is used to increase the kinetic energy of the particles of ice to such an extent that they break away from the rigid lattice structure of the solid form, ice, and move around freely to form the liquid form, water. So, until all the ice has melted, the heat absorbed does not raise the temperature of the ice-water mixture. In the same way the temperature does not change while a liquid is boiling. This heat, which does not raise the temperature of the body, is called Latent Heat. Water has three types they are solid,liquid and gaseous.....