CHEM 162 EXPERIMENT 5 UPDATED ACTUAL EXAM QUESTIONS CORRECT ANSWERS GRADED A PLUS

CHEM 162 EXPERIMENT 5 UPDATED ACTUAL EXAM QUESTIONS CORRECT ANSWERS
GRADED A PLUS
CHEM 162 Experiment 5 Comprehensive TEST
2026/2027 Questions and Answers Verified Solutions
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Question:
If molecule A has an enthalpy of vaporization, ∆Hvap, that is larger than molecule B, what does this
imply about the intermolecular forces of molecule A relative to molecule B? a. Higher b. Lower c.
Equal d. Not enough information to determine

Answer:
a



Question:
For the questions 29-32, choose which would result in a larger deltaT as the organic liquid
evaporated. Assume that the compounds in question are similar to one another. Justify your answer.

Answer:




Question:
A small deltaHvap or a large deltaHvap

Answer:
large deltaHvap



Question:
Weaker intermolecular forces or stronger intermolecular forces

Answer:
stronger, need more energy/temp to overcome so larger difference

, Question:
Less structural branching or more structural branching

Answer:




Question:
Has no hydrogen bonding or capable of hydrogen bonding.

Answer:




Question:
Liquids with __________ intermolecular forces have a ________ enthalpy of vaporization, and the
molecules escape into the vapor phase _________. a. Stronger, larger, with difficulty b. Stronger,
smaller, easily c. Weaker, larger, easily d. Weaker, smaller, with difficulty

Answer:
a



Question:
For several molecules with the same chemical formula, how does the degree of branching influence
the relative intermolecular forces? Why?

Answer:
IM forces based on surface area > branching = < surface area = < IM forces



Question:
Rank the following molecules from the strongest to weakest intermolecular forces and why?

Answer:
the larger the molecule, the larger the surface area, and the stronger the attraction