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 à liquid

gas à solid

liquid à gas

solid à gas
3 points

question 22

the process of evaporation describes which of the following changes of state?

solid à liquid

gas à solid

liquid à gas

solid à 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