o-chem exp 1 - melting points and boiling points
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12 Terms
intensive property
characteristic of a substance that does not depend on the amount of matter present
intensive properties
melting and boiling points are
identify a compound
melting point and boiling point are easy to measure and help
melting point
The temperature at which a solid becomes a liquid
impurities
lower the melting point of a pure substance and broaden its melting point range
boiling point
the temperature the vapor pressure of a liquid equals atmospheric pressure
1 atm
normal boiling point is the boiling point when atmospheric pressure is
decreased atmospheric pressure
lowers the boiling point of a liquid
increased atmospheric pressure
raises the boiling point of a liquid
Impurities
increase the boiling point of a liquid
microboiling point determination theory
based on the definition of a boiling point: the temperature at which a liquid's vapor pressure equals the external atmospheric pressure
lower vapor pressure
a substance has stronger intermolecular forces and evaporates less easily, making it less volatile and giving it a higher boiling point
Note 
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