Boiling is a physical process where a liquid changes into a gas. This happens when the liquid's internal pressure (vapor pressure) becomes strong enough to overcome the external pressure pushing down on it.

Key Points:

• Boiling Point: The specific temperature at which a liquid boils. For pure water at standard sea level pressure, this is approximately $100^{\circ}C$ ($212^{\circ}F$).
• Atmospheric Pressure: This is the pressure of the air around us. The lower the atmospheric pressure (like at high altitudes), the lower the boiling point of water.
• Impurities: Adding a substance like salt to water raises the boiling point because the salt particles get in the way of the water molecules, making it harder for them to escape as gas.
• Energy and Phase Change: During the boiling process, the temperature stays constant. All the energy being added is used to change the water from a liquid to a gas, not to increase its temperature.

Why It Matters:

Understanding the boiling point helps us in everyday tasks, from cooking at different altitudes to using a pressure cooker to cook food faster. It's a fundamental concept in thermodynamics and chemistry.

Tips for Using the Simulation:

• Run the simulation with Pure Water and Salt Water to see the effect of impurities on the boiling point.
• Change the Atmospheric Pressure setting to see how altitude affects the temperature at which boiling occurs.
• Pay close attention to the temperature-time graph and look for the flat line that shows the boiling point.