Frosh PhySci - Sublimation quiz

Question 0

F -

T/F Sublimation is an example of a change of state.

Answer 0

True

Question 1

F -

_______________ is the process in which a solid changes directly to a gas.

Answer 1

Sublimation

Question 2

Which of the following substances changes directly from a solid to a gas at room temperature?  
a- naphthalene
b- water ice
c- snow 
d- two of the above

Answer 2

A - naphthalene

Question 3

The “fake” fog produced on a stage forms when solid _________ sublimates.

Answer 3

Carbon dioxide (Dry ice)

Question 4

What conditions are needed for snow to undergo sublimation? 
a- intense sunlight
b- very cold temperatures
c- dry winds
d- all of the above

Answer 4

D- all of the above

Question 5

T/F Solid air freshners gradually shrink because they undergo sublimation.

Answer 5

False

Question 6

T/F Whenever water ice gains heat, it undergoes sublimation.

Answer 6

False Could change to a liquid first. Melting

Question 7

T/F After a substance sublimates, its particles have less energy..

Answer 7

False

More energy Solid—> Gas

Question 8

Where is sublimation of snow and ice most likely to take place? Why?

Answer 8

High mountain peaks

Very cold, dry winds, low air pressure and intense sunlight

Question 9

If air pressure is lowered, how does this affect the chances of a solid undergoing sublimation?

Answer 9

Increases the chances.