Question

1.) If a molecule has a high vapor pressure…

• A) Then the molecule experiences strong intermolecular forces.
• B) Then the molecule experiences weak intermolecular forces.
• C) The molecule definitely experiences hydrogen bonding.
• D) There is not enough information to determine the strength of the intermolecular forces.

2.) A solution of ethanol in water has a boiling point of 100.55^oC. What is the molality of the ethanol in the water?

Boiling point for pure water = 100^oC
K_b = 0.51 ^oC /m
= K_b x m x i

• A) 0.53 m
• B) 0.51 m
• C) 1.07 m
• D) 2.14 m

3.) What is the freezing point of the same solution outlined in the previous question?
K_f = 1.86 ^oC/m
Freezing point pure water = 0^oC

• A) 2^oC
• B) 1.86^oC
• C) -2^oC
• D) -5.2^oC