Exam
Name___________________________________
 
MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question. 
1) 

Based on molecular mass and dipole moment of the five compounds in the table below, which should have the highest boiling point? 

 

1) 

_______ 
A) 

CH3OCH3  
B) 

C H3Cl  
C) 

C H3CN  
D) 

C H3CH2C H3  
E) 

CH3CHO 

 
2) 

Of the following substances, only __________ has London dispersion forces as the only intermolecular force.

C H3OH
N H3
H2S
Kr
HCl 

2) 

_______ 
A) 

N H3 

B) 

Kr 

C) 

HCl 

D) 

C H3OH 

E) 

H2S 

 
3) 

Of the following substances, __________ has the highest boiling point.

H2O
CO2
CH4
Kr
NH3 

3) 

_______ 
A) 

H2O 

B) 

CO2 

C) 

Kr 

D) 

NH3 

E) 

CH4 

 
 
4) 

The heating curve shown was generated by measuring the heat flow and temperature for a solid as it was heated. The slope of the __________ segment corresponds to the heat capacity of the liquid of the substance. 

4) 

_______ 
A) 

AB 

B) 

BC 

C) 

CD 

D) 

DE 

E) 

EF 

 
 
5) 

On the phase diagram above, segment __________ corresponds to the conditions of temperature and pressure under which the solid and the gas of the substance are in equilibrium.  

5) 

_______ 
A) 

AD 

B) 

BC 

C) 

AC 

D) 

CD 

E) 

AB 

Questions 6-10 refer to the phase diagram of a pure substance shown below-

a)	Sublimation
b)	Condensation
c)	Solvation
d)	Fusion
e)	Freezing

6) If the temperature increases from 10 degrees Kelvin to 60 degrees Kelvin at a constant pressure of .7 atm, which of the processes occurs?  

7) If the temperature decreases from 70 to 40 at a pressure of 1.5 atm, which of the processes occurs?

8) If the pressure increases from 0.5 to 1.5 atm at a constant temperature of 50, which of the processes occur?

9) What is the name of point A?

10) Do you think that this substance is polar, non-polar, or ionic? Why

1) 

C 

2) 

B 

3) 

A 

4) 

C 

5) 

C