Boiling Myth?


“Adding salt to water makes it boil more quickly.”


Ruling:
Mostly false. Depends on the nature of the salt.

Analysis:
Merely adding some salt to regular water will only make a difference in large quantities. However, it is true that salt water boils more quickly than regular water. If you look at the heat capacity of salt water, you will find that it is less than pure water. In other words, it takes less energy to raise the temperature of salt water 1°C than pure water. This means that salt water heats up faster and eventually gets to its boiling point first.

See other: Mythconceptions?

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