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What are normal and standard boiling poi...

What are normal and standard boiling points? Give their values for `H_2O`.

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The temperature at which a liquid boils at 1 atm pressure is called normal boiling point.
The temperature at which a liquid boils at 1 bar pressure is called standard boiling point.
For `H_2O` the normal boiling point is `100^@C` and the standard boiling point is `99.6^@C`.
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