Liquids
Click on the correct answer
1
What forces hold the particles in the liquid state?
Gravity
Surface tension
Van der Waals
Electrostatic
Covalent
2
This is where the rate of evaporation is equal to the rate of condensation
The law of equal rates
Reciprocity
Equilibrium
Dynamic equilibrium
Balanced evaporation
3
Liquids that have weak intermolecular forces of attraction would also have
high vapor pressures
low vapor pressures
No vapor pressure
High boiling points
High rates of solubility
4
What accounts for the inordinately high boiling point of water?
The high molecular weight of water
The fact that water has a high surface tension
The fact that water is nonpolar
The fact that water is covalently bound
hydrogen bonding
5
Water evaporates quicker when it is heated because
water is polar
the higher kinetic energy makes increases the mean free paths of the molecules
water has a low vapor pressure
the hydrogen and oxygen separate easier
the flames push the molecules out
6
"Water boils at 100 degrees celsius." Why is this statement incomplete
Because water boils at 99.9 degrees celsius
Because the heat of vaporization of water makes this impossible.
Because 100 degrees celsius is the melting point of water.
Because water only boils at 100 degrees celsius at sea level.
Because water boils at 100 Kelvin
7
Why does evaporation lower the temperature of the liquid?
Because heat is required to increase the mean free paths of the molecules. This heat is taken from the liquid.
Because of the law of conservation of matter.
Because the water is replaced by cold air.
Because the water gained heat from the atmosphere.
Because oxygen molecules stay on the surface of the liquid.
8
Why do different liquids have different boiling points?
Because different liquids have different molecular masses.
Because different liquids react differently to atmospheric pressure.
Because different liquids have different intermolecular forces of attraction.
Because it is difficult to measure the precise boiling point of a liquid.
Because different liquids adhere to the surface of the container differently.
9
What three variables does a phase diagram show a relation between?
Mass, volume and equilibrium
Temperature, mass and volume
Volume, pressure and number of particles.
Temperature, pressure and changes in state.
Solids, liquids and vapor
10
A liquid boils when
its density goes below 1.00 g/cm3
its vapor pressure becomes equal to atmospheric pressure
the molecules of water expand
the temperature reaches 100 degrees celsius
the atmospheric pressure drops below standard