Solute a are strongly solvated by water while those

solute A are strongly solvated by water, while
those of solute B are only weakly solvated.
Which of the two dissolution processes is more
exothermic, on a kJ/mol basis?
1. It depends on the molecular weights of
the solutes.
2. Both processes are equally exothermic.
3. dissolving B in water
4. dissolving A in water correct
5. Cannot be answered without knowing the
identities of the solutes.
Explanation:
Since the solvation process is exothermic,
dissolving A (the more strongly solvated so-
lute) will be more exothermic process.
009 10.0 points
Ethyl alcohol (CH
3
CH
2
OH) is/is not soluble
in water.
1. is; ethyl alcohol exhibits dipole-dipole and
H-bonding interactions with water. correct
2. is not; ethyl alcohol exhibits dispersion
forces which are insufficient for dissolving.

jung (jj23596) – Homework 2 – Sutcliffe – (52440) 3
3. is; all organic molecules are soluble in
water.
4. is not; ethyl alcohol is an ionic compound
with a hydroxide group and hydroxides are
insoluble.
Explanation:
The oxygen on ethyl alcohol has two lone
pairs and two polar bonds. Thus, it can
form dipole-dipole and H-bonding interac-
tions with polar water.
010 10.0 points
Water causes many electrolytes to dissociate
Which of the following statements about col-
ligative properties of aqueous solutions is
FALSE?
1. Osmosis is a colligative property.
011 10.0 points
Henry’s Law would allow one to predict
1. the vapor pressure of the solvent above
the pure solvent.
2. the extent of dissociation of solute in
solution.
012 10.0 points