Question

The normal boiling point of water in an open container is 100∘C. What is true about the boiling point of water in an open container at the Dead Sea (elevation 400 m below sea level)?

Select the correct answer below:

The boiling point of water will be >100∘C at the elevation of the Dead Sea.

The boiling point of water will be <100∘C at the elevation of the Dead Sea.

The boiling point of water will be =100∘C at the elevation of the Dead Sea.

It is not possible to predict the boiling point of water at the Dead Sea based on this information.

Answer 1

Boiling point of water depends on atmospheric pressure. Boiling point is the temperature at which vapour pressure of liquid becomes equal to the atmospheric pressure. Since in dead sea atmospheric pressure is high thus boiling point is also high.

Also boiling point of liquid depends on the amount of non -volatile component present in it. Higher the concentration of non-volatile component, higher will be the boiling point of liquid. Since dead sea contain high concentration of non-volatile components, thus it's boiling point is high.

So, overall boiling point of water will be > 100° C at the elevation of the dead sea.

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