PHYSICS [3 Mark Question Answer]

Experiment to prove expansion in gases is very large as compared to solids or liquids:
1. Take a clean empty bottle and fill it with hydrogen gas.
2. Fix a deflated rubber balloon over the mouth of the bottle.
3. Place the bottle in a trough of hot water for a few minutes.
Observations:
1. After a few minutes, we can observe that the balloon gets inflated.
2. Hence we can conclude that the expansion in gases is very large as compared to solids or liquids.

Gases are having large interparticle space and weak interparticle force of attraction. When the gas is heated, its molecules will start moving faster and they collide with each other more violently. The violent collision of faster-moving molecules makes them away from each other and it causes the volume to increase. This increase in the volume of gas when heated is the thermal expansion of gases. The thermal expansion happening in gas is cubical expansion.

The apparatus used in the experiment consists of a metal ball suspended by a metal chain and a ring connected to the stand. The inner diameter of the ring is the same as the outer diameter of the ball, so that ball can easily pass through the ring.

If we heated the ball on a Bunsen flame for two minutes and try to pass the ball through the ring, we can see that ball does not pass through the ring.
Conclusion:-
1.The ball is not able to pass through the ring because it got expanded on heating.
2.Gravesande’s ring and ball experiment conclude that solids will expand on heating.