Boiling Liquid
Click on the correct answer.
1
Intermolecular attractions
are the attractions within a molecule
are the attractions which exist between separate molecules
are able to hold a substance together in either its liquid or solid state
must be overcome if a liquid is to boil
2
Vapor pressure
is the pressure of the gas contained within the liquid
depends on the temperature: the higher the temperature the greater the vapor pressure
is the pressure of the vapor exerted on the surface of the liquid
is different for different substances
3
Boiling point
is that temperature at which the vapor pressure of a substance is equal to the atmospheric pressure
is influenced by the strength of intermolecular attractions within a liquid
is a "temperature," not a "time"
is 100 degrees for all substances
is always higher than the freezing point for a given substance
4
A liquid can boil without being heated if
it is pressurized
the pressure above the liquid is reduced
it is cooled
it is diluted with a solvent
5
In a closed container of a liquid with head space above it
no molecules leave the liquid
molecules are not able to enter into the liquid from the head space
the molecules in the head space exert an "equilibrium vapor pressure" on the liquid surface
molecules leave the surface as fast as they enter it
the pressure above the liquid depends on the temperature of the system
6
In the diagram the vapor pressure curve on the graph is
the horizontal line
the vertical line
the curved line
7
If the pressure above the acetone is reduced
the acetone will boil at 57 degrees Celsius
the acetone will boil above 57 degrees Celsius
the acetone will boil below 57 degrees Celsius
one can predict at what temperature the acetone will boil
8
When a liquid boils it means
that it is hot
that its vapor pressure must at that temperature be the same as atmospheric pressure
that intermolecular attractions between molecules have been overcome
that heat is being supplied
that it is converting from the liquid to the gas phase
9
Since water boils at 100 degrees Celsius at normal atmospheric pressure but acetone boils at 57 degrees Celsius at normal atmospheric pressure, it can be concluded that
acetone boils at a lower temperature than water
Acetone is cooler than water when it boils
The intermolecular attractions between acetone molecules are stronger than between water molecules
acetone has a greater equilibrium vapor pressure than water does (at the same pressures for each substance)
10
Based on what you know about intermolecular attraction strength in the two substances, which would evaporate more quickly if it were spilled:
acetone
water
the evaporation rate would be the same for each substance