EXPERIMENT 6 (boiling Point Determination) Flashcards
The temperature at which it changes from a liquid to gas. This physical property is often used to identify substance or to check the purity of the compound.
Boiling point
Chemist can only obtain a boiling range of a __-___ accuracy
2-3°C
The boiling point of a ___ is an important physical property
Liquid
The temperature when its vapor pressure is equal to the atmospheric pressure
Liquid boiling point
Normally, boiling point is measured at one atmosphere (___)
101 kPa/ 760 torr
Boiling point are approximately related to their molecular weight, the ___ the molecular weight, the ___ the boiling point
Higher
Higher
The temperature at which the vapor pressure of the liquid exactly equals the pressure exerted on it, causing the liquid to “boil” or change to the gas phase
Boiling point
The boiling point of an organic liquid is the ____ over which the state of the organic compound changes from the liquid phase to the gas phase at ___ of pressure
Temperature range
760 mm
The molecules of compounds that exists in the ___ state are relatively closed together, compared with molecules of ___ compounds.
Liquid
Gaseous
The close proximity of molecules in the liquid state allow molecules to interact via ___
Non-covalent interaction
Molecules of a ____ compound are much farther away from each other and are not confined to a specific volume by non-covalent interaction
Gaseous
If enough energy is provided to the liquid, the molecules begin to ___ from each other by “ __” the non-covalent forces that hold the compound in the liquid state
Move away
Breaking
___ are broken during a change from the liquid phase to the gas phase
No covalent bonds
The ___ must be heated very slowly and the bath is stirred gently to ensure uniform heating
Liquid paraffin bath
