Chapter 13 Quiz

Chem 20                          D. Oliver

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  1. Water is introduced into an evacuated container attached to a mercury manometer and the final temperature of the system is 20°C. The difference in height of the mercury columns in the manometer is______cm.

    2. Your answer:
    31.8
    760
    12.6
    273
    1.75

  2. As intermolecular forces within substances increase, _____________________________.

    3. Your answer:
    the boiling point increases and the vapor pressure increases.
    the boiling point increases and the vapor pressure decreases.
    the boiling point increases and the vapor pressure approaches atmospheric pressure.
    the boiling point decreases and the vapor pressure decreases.
    the boiling point decreases and the vapor pressure increases.

  3. For a substance that has larger cohesive forces than adhesive forces, ____________________

    4. Your answer:
    the vapor pressure will be larger.
    the substance will tend to stick to other substances.
    the meniscus will be concave.
    the boiling point will be smaller.
    the meniscus will be convex.

  4. The normal boiling point of ethylene chloride _____________

    5. Your answer:
    is -10°C.
    is 12°C.
    is low because of hydrogen boinding.
    is high because of hydrogen boinding.
    is larger than its vapor pressure.

  5. The amount of heat required to raise the temperature of 50.0 g of ice from -10°C to 110°C is ________

    6. Your answer:
    15590 cal.
    15600 cal.
    27380 cal.
    73100 cal.
    36500 cal.

  6. The bond angle between adjacent hydrogen-oxygen bonds in water molecules is

    7. Your answer:
    smaller than expected which explains why water has an unexpectedly high boiling point.
    180° since ther are two atoms attached to the oxygen.
    104.5° since unbonded pairs of electrons occupy more volume than bonded pairs of electrons.
    the tetrahedral angle, 109.5, since there are four pairs of electrons around the oxygen.
    polar.

  7. Which of the following molecules is expected to exhibit hydrogen bonding.

    8. Your answer:
    HCl
    CH3NH2
    H2CO
    CF3H
    CH3-O-CH3

  8. The folloing molecule are in order of increasing boiling point.

    9. Your answer:
    CH4 < CH3OH < CH3-O-CH3
    CH3OH < CH4 < CH3-O-CH3
    CH4 < CH3-O-CH3 < CH3OH
    CH3-O-CH3 < CH3OH < CH4
    CH3-O-CH3 < CH4 < CH3OH

  9. Heating 6.00 moles of Ba(Cl)2•2H2O will yield ________________.

    10. Your answer:
    6.00 moles of BaCl2 and 12.0 moles of water vapor.
    6.00 moles of Ba, 12.0 moles of Cl and 12.0 moles of water vapor.
    1.00 moles of BaCl2 and 2.00 moles of water vapor.
    6.00 moles of Ba, 6.00 moles of Cl2 and 12.0 moles of water vapor.
    6.00 moles of BaCl2 and 2.0 moles of water vapor.

  10. The acid anhydride of HClO3 and basic anhydride of Al(OH)3 are ___________ and _____________ respectively.

    11. Your answer:
    Cl2O5, Al(OH2)2
    Cl2O5, Al2O3
    Cl2O7, Al2O3
    Cl2O5, Al(HO2)
    ClO3, Al(HO2)

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