Lesson 3 Flashcards
The force that causes the molecules on the surface of a liquid to be pushed together and form a layer.
Surface Tension
They lock into a thin layer of elastic membrane.
Surface molecules
Surface tension and intermolecular force of attraction are _________.
Directly proportional
Surface tension and temperature are _________.
Inversely proportional
The resistance of fluids to flow.
Viscosity
Viscosity and intermolecular force of attraction are _________.
Directly proportional
Viscosity and temperature are _________.
Inversely proportional
If the escaping tendency of the molecules is low…
Then the evaporation is slow and produces a low vapor pressure in the liquid.
Liquids have ______ vapor pressures at _____ temperatures
Different
If a liquid has weak intermolecular forces of attraction, the escaping tendency of the molecules is _____.
High
Is the temperature at which the vapor pressure of the liquid is equal to the atmospheric pressure.
Boiling point of a liquid
Liquids that have high vapor pressure have ___ boiling points.
Low
Is the amount of heat needed to vaporize a given amount of substance as its boiling point.
Molar heat of evaporation
The stronger the intermolecular forces of attraction, the _____ the heat of vaporization.
Higher
