Final answer:
When a bubble is formed, it contains air trapped inside it. The pressure inside the bubble is equal to the atmospheric pressure. As the temperature rises, water vapor enters the bubble, causing it to expand and rise.
Step-by-step explanation:
Bubbles are a great way to understand air pressure. When a bubble is formed, it contains air trapped inside it. The pressure inside the bubble is equal to the atmospheric pressure, which is around 760 mm Hg. If a hole is made in the bubble, the air inside will be forced out, causing the bubble to decrease in size and the pressure inside to increase to the atmospheric pressure.
The concept of air pressure can also be seen when water boils. Water usually contains dissolved air and impurities, which form small bubbles in a glass of water. As the temperature rises, the water vapor inside the bubble increases, causing the bubble to expand to maintain a pressure of 1.00 atm. At 100°C, the vapor pressure of water exceeds its partial pressure in the bubble, causing continuous entry of water vapor. As a result, the bubble grows in size, increases the buoyant force, and rises to the surface, which we call boiling.
This phenomenon can also be observed on a smaller scale, where a bubble with water vapor inside expands and rises due to the increase in temperature. Overall, understanding bubbles can help us understand how air pressure works in different situations.