1--: Rank the following liquids in order of increasing volatility. Rank the following liquids in order of
increasing vapor pressure at 50oC.
a) ethanol, C2H5OH
b) methanol, CH3OH
c) ethylene glycol, HOCH2CH2OH

2--When pressure is added to a gas, it can be liquified (condensed). Which of the following gases
requires the least amount of pressure to liquify? Most?
a) methane, CH4
b) ammonia, NH3
c) ethane, C2H6

3--
When pressure is removed from a liquid, it can boil. Which of the following liquids requires the
least amount of pressure to liquify? Most?
d) ethanol, C2H5OH
e) methanol, CH3OH
f) ethylene glycol, HOCH2CH2OH

1 b, a, c
2 b, c, a
3 e, d, f