Question 4 was short, so I finished it quickly.
I am thinking of posting one question a day. It feels a little disappointing when there is not much material,
but consistency matters, so I will resist doing too much.
A visitor arrived midway through, and I think the rest of the recording was a little distracted.
Deleting it and recording again would be a hassle, so I really cannot face redoing it.
The questions can again be downloaded from https://apcentral.collegeboard.org/pdf/ap19-frq-chemistry.pdf.
Refer to the answers below.
https://apcentral.collegeboard.org/pdf/ap19-frq-chemistry.pdf ↗
a. Raising the temperature increases the molecules’ average kinetic energy and speed.
b. P₁/T₁ = P₂/T₂.
0.70 atm / 299 K = P₂ / 425 K.
P₂ = 0.99 atm.
c. Higher temperature leads to more frequent collisions with the container and greater momentum transfer, increasing pressure.
d. The ideal gas law neglects intermolecular attractions. Nonpolar CO₂ molecules have London dispersion attractions, which pull molecules toward one another and reduce the pressure exerted on the container compared with ideal behavior.