What is the boiling point?

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(N/A) The temperature at which the vapor pressure of a liquid becomes equal to the external atmospheric pressure is called the boiling point of that liquid.
Normal boiling point: The boiling point at $1 \ atm$ pressure is called the normal boiling point.
Standard boiling point: The boiling point at $1 \ bar$ pressure is called the standard boiling point of the liquid.

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