Dr. Herrick's CH222
Pressure Quiz 5

     

 

   

Liquids and Solids
Copyright D. Herrick

 

20 Questions from past exams.
Practice for speed.  Aim for 1 minute per problem.

 
  
1. Which compound has the higher boiling point?
A) CH3-CH2-CH3    B) CH3-CH2-CH2-CH3  
  
2. Which compound has the higher vapor pressure?
A) CH3-CH2-CH2-OH   B) HO-CH2-CH2-OH   
  
3. Which compound has the highest viscosity
A) CH3-CH2-CH2-CH2-CH2-OH
B) CH3-CH2-CH2-CH2-CH2-CH3 
C) CH3-CH2-CH2-CH3

    

4. Which compound has the lowest heat of vaporization?
A) HO-CH2-CH2-CH2-OH  
B) CH3-CH2-CH2-CH2-OH
C) CH3-CH2-CH2-CH2-CH3

             

5.

What type of crystalline lattice does ice have?

A) ionic D) atomic
B) metallic E) molecular  
C) network covalent    

  

6.  What type of crystalline lattice does NH4NO3 have?
A) metallic D) ionic  
B) molecular E) atomic
C) network covalent    

         

7. What force in liquid mercury is most responsible for its convex meniscus in a glass tube?
A) ionic bonding D) covalent bonding
B) dipole-dipole E) metallic bonding
C) hydrogen bonding F) London dispersion

     

8. The reaction associated with the vaporization of H2O is
A) H2O(l)  H2(g) + O2(g)
B) H2O(l) H2O(g)    
C) H2O(s) H2(g) + O2(g)
D) H2O(s) H2O(g)
  
9. What do "a" and "b" represent in the van  der  Waals equation of state for one mole of gas? 
                           (P + a/V2) (V-b) = RT
 
A) a = attractive forces between molecules; b = attractive forces between molecules
B) a = attractive forces between molecules; b = finite size of molecules  
C) a = finite size of molecules; b = attractive forces between molecules
D) a = finite size of molecules; b = finite size of molecules

  

10. Determine DH for the process 

     H2O(l, 25C) H2O(g, 100C). 

The heat of vaporization of  water is 40.7 kJ/mol and the heat capacity of liquid water is 75.4 J/molC.

A) 46.4 kJ   D) 35.0 kJ
B) 44.5 kJ E) 52.1 kJ
C) 48.3 kJ F) 41.8 kJ

  

11. The expected attractive forces between H2 molecules are:
A) London dispersion only  
B) dipole-dipole only
C) dipole-dipole and London dispersion
D) hydrogen bonding and London dispersion
E) hydrogen bonding only
F) dipole-dipole and hydrogen bonding
  
12. The expected attractive forces between HCl molecules are
A) London dispersion only
B) dipole-dipole only
C) dipole-dipole and London dispersion
D) hydrogen bonding and London dispersion
E) hydrogen bonding only
F) dipole-dipole and hydrogen bonding
  
13. The expected attractive forces between NH 3 molecules are:
A) London dispersion only 
B) dipole-dipole only
C) dipole-dipole and London dispersion
D) hydrogen bonding and London dispersion
E) hydrogen bonding only
F) dipole-dipole and hydrogen bonding

               

14. Which of these compounds has the highest boiling point?
A)  CH4     B)  CF4 C)  CCl4  D)  CBr4  

       

15. Which of these compounds has the lowest boiling point?
A)  HF B)  HCl   C)  HBr D)  HI

    

16. If the phase diagram has the normal boiling point at 80C what is the normal freezing point?
A) 20C
    
B) 30C
C) 40C  
D) 50C
E) 60C
  
17. Identify the sublimation curve from possible answers A-E on the phase diagram.
  

              

              

18. What type of crystalline lattice does CO 2 have?
A) metallic
B) ionic
C) network covalent
D) atomic 
E) molecular  
  
19. Which reaction describes deposition?
A) CO2(s) CO2(g),  endothermic
B) CO2(g) CO2(s),  exothermic  
C) CO2(g) CO2(s),  endothermic
D) CO2(s) CO2(g),  exothermic
E) CO2(l) CO2(g),  endothermic
F) CO2(g) CO2(l),  exothermic
G) CO2(g) CO2(l),  endothermic
H) CO2(l) CO2(g),  exothermic
  
20. Predict the intermolecular forces between molecules of CH3-O-CH3, dimethyl ether:
A) London dispersion  only 
B) dipole-dipole only
C) dipole-dipole and London dispersion  
D) hydrogen bonding and London dispersion
E) hydrogen bonding only
F) dipole-dipole and hydrogen bonding

  

  

 

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   Copyright D. Herrick