Question

distinguish between normal boiling point and standard boiling point​

Answer 1

Answer:

When the external pressure is equal to one atmosphere pressure, the boiling point is called normal boiling point. When the external pressure is 1 bar,it is called standard boiling point.

Answer 2

Answer:

Normal Boiling point:-

Normal boiling point is the boiling temperature of a liquid at 1 atm pressure. Moreover, atmospheric boiling point and atmospheric pressure boiling point are two synonyms for this term.

At this boiling temperature, the vapour pressure of the liquid equals 1 atm (which is the defined atmospheric pressure at sea level. At this point, the vapour pressure of the liquid overcomes the atmospheric pressure and as a result, bubbles of liquid vapour forms.

Standard Boiling point:-

Standard boiling point is the boiling temperature of a liquid at 1 bar. Also, it is this temperature we consider as the IUPAC defined boiling point (since 1982). For example, the standard boiling point of water is 99.61 °C at 1 bar.

What is the Difference Between Normal Boiling Point and Standard Boiling Point?

Normal and standard boiling points are different from each other according to the pressure at which we measure the boiling point. Hence, the key difference between normal boiling point and standard boiling point is that the boiling temperature at 1 atm is the normal boiling point, whereas the boiling temperature at 1 bar is the standard boiling point. For example, the normal boiling point of water is 99.97 °C at 1 atm while the standard boiling point of water at 1 bar is 99.61 °C..

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