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Self Assessment A
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1

Argon atoms do not combine to form species such as Ar2, yet argon atoms do attract one another weakly through
A)dipole-dipole forces.
B)dipole-induced dipole forces.
C)ion-dipole forces.
D)dispersion forces.
E)hydrogen bonding.
2

Which of the following substances is not likely to exhibit hydrogen bonding?
A)CH3CH2OH
B)CH3NH2
C)HOCH2CH2OH
D)(CH3)3N
E)NH2OH
3

Which of the following liquids would have the highest viscosity at 25 oC?
A)HOCH2CH2OH
B)CH3CH2OH
C)CH3CH2Cl
D)CH3COOCH3
E)CH3CH2OCH2CH3
4

Lithium metal has a body-centered cubic unit cell. How many lithium atoms are there in one unit cell?
A)1
B)2
C)3
D)4
E)8
5

Osmium tetraoxide, OsO4 is a molecular crystal. Which of the following general properties would you NOT expect it to possess:
A)being a poor conductor of electricity.
B)having soft rather than brittle crystals.
C)having a melting point around 40 oC.
D)having a melting point around 1600 oC.
6

Which of the following substances should have the highest heat of vaporization?
A)H2O
B)H2S
C)C6H6
D)CH3OH
E)CH3OCH3
7

Which of the following gases would have the highest critical temperature?
A)NH3
B)CH3OH
C)H2
D)C6H6
E)H2O
8

How much energy (heat) is required to convert 248 g of water from 0 oC to 154 oC? Assume that the water begins as a liquid, that the specific heat of water is 4.184 J/g. oC over the entire liquid range, that the specific heat of steam is 1.99 J/g. oC, and the heat of vaporization of water is 40.79 kJ/mol.
A)562 kJ
B)130 kJ
C)692 kJ
D)589 kJ
E)639 kJ
9

Diethyl ether has a heat of fusion of 6.90 kJ/mol and a heat of vaporization of 26.0 kJ/mol. Estimate the heat of sublimation of diethyl ether.
A)-32.9 kJ/mol
B)+32.9 kJ/mol
C)-19.1 kJ/mol
D)+19.1 kJ/mol
E)The heat of sublimation can't be estimated from the data given.
10

Between 20 and 80 oC, the enthalpy of vaporization of benzene is 31.0 kJ/mol. At 26 oC, the vapor pressure of benzene is 100. torr. Calculate the vapor pressure of benzene at 45 oC. R = 8.314 J/K.mol.
A)18.1 torr
B)633 torr
C)47.6 torr
D)211 torr
E)None of the above





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