Question

Describe an activity to show that particles are closely packed in solids and least in gases.

Answer 1

Answer:

Experiment - Mercury globules are placed in a petri dish and kept apart. The petri shakes slowly and mercury globules come together to for a big globule.

The formation of big globules shows that forces of attraction exist between the molecules.

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Experiment - A measuring cylinder with 100ml of water is taken and solid sugar crystals are added to it. The solution is stirred carefully to form a sugar solution.

It is observed that volume of water does not change which shows that sugar fills up the intermolecular spaces between water molecules. Hence the water level does not change proving that the intermolecular spaces are more in liquids as compared to solids.