Question

Why does a gas bubble released at the bottom of a lake grow in size as it rises to its surface?

Answer 1

1. The reason is that when the bubble is at the bottom of a lake, the total pressure exerted on it is the sum of the atmospheric pressure and the pressure due to the water column.
2. As the gas bubble rises, due to a decrease in-depth, the pressure due to the water column decreases, so the total pressure exerted on the bubble decreases.
3. According to Boyle's law, the volume of bubble increases due to the decrease in pressure, i.e., the bubble grows in size.
4. As the pressure decreases from a certain depth to the surface, the size of the bubble increase with the decrease in pressure.