* Boiling Point Elevation: When you add salt to water, you raise its boiling point. This is because the dissolved salt ions (sodium and chloride) disrupt the water molecules' ability to escape into the vapor phase. They effectively "hold on" to some of the water molecules, requiring a higher temperature for boiling to occur.
* Heat Capacity: Salt also slightly increases the heat capacity of water. Heat capacity is the amount of heat needed to raise the temperature of a substance by a certain amount. Water with salt requires more heat to reach its higher boiling point compared to pure water.
In summary:
* Pure water boils faster because it has a lower boiling point.
* Saltwater boils slower because the salt raises the boiling point and increases the heat capacity of the water.
