13.3: Vapor Pressure and Phase Diagrams

 

 

1.  Which set of curves would represent the effect of increasing temperature on the vapor pressure of a liquid?

(A)  A & B

(B)  C & D

(C)  All of them

(D)  None of them

 

 

2.  The normal boiling point is defined as:

 

 

3.  The normal boiling point of diethyl ether is 34.6oC and of water is 100oC. Which has the higher vapor pressure at 20oC?

 

4.  If one of the compounds in question 1 is diethyl ether and the other is water, curve___is diethyl ether and curve___is water.

 

 

 

 

 

 

 

 

 

 

5. The point X represents:

(A)  the critical point, where a solid, liquid and vapor can coexist

(B)  The critical point where the two fluid phases can not be distinguished

(C)  The triple point, where a solid, liquid and vapor can coexist

(D)  The triple point, where the fluid phases can not be separated

 

 

 

6.  The point Y in the figure of question 6 represents

(A)  the critical point, where a solid, liquid and vapor can coexist

(B)  The critical point where the two fluid phases can not be distinguished

(C)  The triple point, where a solid, liquid and vapor can coexist

(D)  The triple point, where the fluid phases can not be separated

 

 

 

7.  Region A of the figure in question 5 represents which phase?

 

 

8. Region B of the figure in question 5 represents which phase?

 

 

9. Region C of the figure in question 5 represents which phase?

 

 

10.  The negative slope between regions A and B of the figure in question 5 indicates:

(A)  the solid is more dense than the liquid

(B)  the liquid is more dense the the solid

(C)  the vapor is more dense than the liquid

(D)  the vapor is more dense than the solid

 

 

11.  The figure in quesion 5 is consitent with a phase diagram for which compound

(A)  carbon dioxide

(B)  sodium

(C)  water

(D)  carbon dioxide and water

 

 

 

12.   The compound in question 5 sublimes at pressures:

(A)  greater than deg O C

(B)  Pressures greater than 1.0 atm

(C)  pressures between 0.0060 and 1.00 atm

(D)  pressures less than 0.0060 atm

 

 

13.  Consider a 1 atm isobar for the compound in question 5. Moving left to right in region A represents

(A)  freezing

(B)  melting

(C)  heating supercooled ice

(D)  none of the above

 

 

 

 

 

 

14.  Consider a 1 atm isobar for the compound in question 5. Adding heat to a substance in region A causes it to warm, what happens when you reach the line between region A & B?

(A)  it boils

(B)  it melts

(C)  it freezes

(D)  it continues to warm up

 

 

15.  Consider a 1 atm isobar for the compound in question 5. Moving left to right in region B represents

(A)  melting

(B)  boiling

(C)  heating liquid water

(D)  cooling liquid water

 

 

16.  Consider a 1 atm isobar for the compound in question 5. Adding heat to a substance in region B causes it to warm, what happens when you reach the line between region B & C?

(A)  it continues to warm

(B)  it condenses

(C)  it boils

(D)  none of the above

 

 

17.  Consider a 1 atm isobar for the compound in question 5. Moving left to right in region C represents

(A)  cooling water

(B)  heating liquid water

(C)  heating ice

(D)  heating steam

 

 

18.  At what pressure can liquid, solid and gaseous water coexist?

(A)  218 atm

(B)  1.00 atm

(C)  0.0060 atm

(D)  none of the above