1. Heating: When you heat water in a pot or kettle, the temperature of the water molecules increases. As the water molecules gain energy, they start moving faster and become more excited.
2. Vapor Pressure: As the temperature rises, the vapor pressure of water increases. Vapor pressure is the pressure exerted by the vapor of a liquid when it is in equilibrium with the liquid. In other words, it's the tendency of liquid molecules to escape from the liquid and turn into gas.
3. Formation of Bubbles: As the vapor pressure inside the water increases, tiny bubbles of water vapor start forming on the bottom and sides of the pot. These bubbles contain low-density water vapor and are less dense than the surrounding liquid water.
4. Buoyancy: The bubbles of water vapor rise to the surface due to buoyancy. Buoyancy is an upward force exerted by a fluid (in this case, water) that opposes the weight of a partially or fully immersed object (the water vapor bubbles).
5. Evaporation: When the bubbles of water vapor reach the surface, they burst, releasing water vapor into the air above the pot. This process of water molecules evaporating from the surface and escaping into the air is called evaporation.
6. Continuous Boiling: As long as you continue to heat the water, more and more bubbles will form, rise, burst, and release water vapor into the air. This continuous process is what we commonly refer to as boiling water.
The boiling point of water is the temperature at which the vapor pressure of water equals the pressure of the surrounding atmosphere. At sea level, the boiling point of water is approximately 100 degrees Celsius (212 degrees Fahrenheit). However, the boiling point can vary depending on the atmospheric pressure; it decreases with increasing altitude.
