Question 16
which of these is an example of an amorphous solid?
diamonds
gold
sugar molecules
glass
3 points
question 17
which of these is true at equilibrium?
particles stop moving.
the number of particles in each phase increases.
the number of particles in each phase remains constant.
the number of particles in each phase decreases.
3 points
question 18
an increase in temperature will affect vapor pressure by:
decreasing the density of the gas molecules, making them lighter and easier to move around
increasing the average kinetic energy of the molecules, making them move faster and collide more
increasing the surface area of the gas molecules, thus increasing the number of collision points available
decreasing the rate of condensation
3 points
question 19
which of the following describes how vapor pressure and kinetic energy are related?
if kinetic energy of the particles is increased, vapor pressure will also increase.
if kinetic energy of the particles is increased, vapor pressure will decrease.
if kinetic energy of the particles is decreased, vapor pressure will increase.
kinetic energy and vapor pressure are not related.
3 points
question 20
at an elevation of 1200 feet (above sea level), it is easier to boil water because
the atmospheric pressure is higher at this elevation
the atmospheric pressure is lower at this elevation
the molecules of the water have less kinetic energy at this elevation
the water is warmer at this elevation
3 points
question 21
the process of deposition describes which of the following changes of state?
solid Ă liquid
gas Ă solid
liquid Ă gas
solid Ă gas
3 points
question 22
the process of evaporation describes which of the following changes of state?
solid Ă liquid
gas Ă solid
liquid Ă gas
solid Ă gas
3 points
question 23
what does the term normal in normal boiling point mean?
the pressure is at 100 degrees celsius.
the temperature is at 100 degrees celsius.
the pressure is at 1 atmosphere.
the temperature is at 1 atmosphere.
3 points