Explore AP Chemistry Unit 3 questions on intermolecular forces, solid and gas properties, solutions, separations, solubility, photons, and Beer-Lambert spectroscopy.
A scientist is investigating the properties of a mixture of and . The scientist
generates the following diagram to represent the mixture.
In the diagram provided, draw a SINGLE dashed line (---) to represent a strong hydrogen-
bonding attraction between one molecule and one molecule in the mixture.
The scientist plans to cool a gaseous mixture of and to form a liquid mixture
and finds data on the two compounds. The data are summarized in the table.
Propose a temperature to which the mixture should be cooled such that and
will both be liquids.
Complete Lewis diagrams and some physical properties for compounds X and Y are given.
A student claims that compound Y has a higher boiling point than that of compound X
because compound Y has stronger London dispersion forces. Do you agree or disagree?
Justify your answer.
An equimolar mixture of the two compounds is heated. When the mixture reaches ,
which compound will have the higher vapor pressure? Justify your answer.
The mixture is heated to 198°C in a sealed, rigid 12.5 L container, at which point both
substances are gases and the total pressure in the container is 2.30 atm. Calculate the number
of moles of gas particles in the container.
