Why a tea bag placed in hot water to make and swells size is model of osmosis?

When a tea bag is placed in hot water, osmosis occurs between the tea bag and the water. Osmosis is the movement of water molecules from an area of high water concentration to an area of low water concentration through a semipermeable membrane. In this case, the semipermeable membrane is the tea bag material.

The tea bag is initially filled with dry tea leaves. When it is placed in hot water, the water molecules move into the tea bag through osmosis. This causes the tea leaves to expand and swell, increasing the size of the tea bag. The water molecules are able to move into the tea bag because the tea bag material is semipermeable, meaning that it allows water molecules to pass through it but not tea molecules.

As the tea bag continues to sit in the hot water, the concentration of tea molecules inside the tea bag increases. This causes the water molecules to move out of the tea bag and into the water, in order to equalize the concentration of water molecules on both sides of the membrane. This process continues until the concentration of tea molecules inside and outside the tea bag is the same.

The swelling of the tea bag is a result of the movement of water molecules into the tea bag through osmosis. This process is also responsible for the release of tea flavor from the tea bag.