CHEM 1305- Home-work 12
1)
2)
NAME:
Which of the following is a property of both liquids and gases?
A) indefinite volume
B) small degree of thermal expansion
D) indefinite shape
E) large degree of compressibility
C) definite volume
Gases are highly compressible because the particles ________.
A) strongly repel each other
B) have no potential energy
D) vibrate too much to be compressed
C) are very far apart
E) have large potential energies
3) Which of the following terms does not involve the solid state?
A) evaporation
B) melting
C) freezing
D) fusion
E) sublimation
4) How many joules of heat must be removed to lower the temperature of a 36.5 g Al bar from 84.1 C to
56.8 C? The specific heat of Al is 0.908 J/g C.
A) 581 J
B) 1090 J
C) 905 J
D) 240 J
E) 849 J
5) What is the final temperature after 336 J of heat energy is removed from 25.0 g of water at 19.6 C?
Specific heat of water  4.184 J/(g C)
A) 32.1 C
B) 27.6 C
C) 16.4 C
D) 24.7 C
E) 22.8 C
6) How many grams of Ag can be heated from 23 C to 36 C when 22 g of Au cools from 95.5 C to
26.4 C?
Specific heat of Ag  0.240 J/(g C)
A) 47 g
B) 28 g
Specific heat of Au  0.130 J/(g C)
C) 63 g
D) 104 g
E) 86 g
7) In the calculation set-up below to determine how much heat is needed to convert 50 g of ice at 20 C to
steam at 300 C, which constant does C represent?
(A)(50 g)(20 C)  (heat of fusion)(50 g)  (B)(50 g)(100 C) 
(heat of vap.)(50 g)  (C)(50 g)(200 C)  total heat
A) specific heat of ice
B) specific heat of water
D) heat capacity of water
E) heat capacity of ice
C) specific heat of steam
8) The predominant intermolecular force in (CH3)2NH is:
A) London-dispersion forces
B) ion-dipole attractions
D) dipole-dipole attractions
E) hydrogen bonding
C) ionic bonding
9) The anomalously high boiling point of water is due to ________.
A) London forces
B) its low heat of vaporization
D) ice being less dense than liquid water
C) hydrogen bonding
E) weak dipole-dipole interactions