What happens when air is heated- Science Mug experiment

 What happens when the air inside a flask, one-fourth filled with water and having a fixed rubber cork pierced through by a long glass tube whose lower end is lying sunken in the water, is heated?

Take a flask made of thin glass and fill one-fourth of it with water. Fix a rubber or cork-stopper tightly on its mouth with a glass tube passing through the stopper. Make sure that the lower part of the tube remains immersed in the water. All the joints of the flask must remain airtight or else you won't succeed in your experiment. Now, rub both of your hands together and place them on that part of the flask which is above the water-level. Next, place a piece of cloth heated in the sun on the flask. What do you see? The water rises up in the tube both the times on its own.



Can you understand why it so happens? In fact, as you have guessed correctly, the heat of your hands and the piece of cloth cause expansion of the air in the bottle. This in turn exerts pressure on the water and the pressure thus caused forces some water to rise up in the tube.

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What happens when air is heated- Science Mug experiment What happens when air is heated- Science Mug experiment Reviewed by Wrestling Mirror on May 16, 2021 Rating: 5

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