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CRS Question, 5–12
ANSWER
Choice 4 describes two opposing changes. When the volume decreases,
the pressure of a trapped gas will increase (at constant temperature
and constant moles of gas). However,
if the pressure drops, more collisions could be restored by adding
more particles of gas in the same ratio as the pressure decline.
Section
5.2: The Gas Laws of Boyle, Charles, and Avogadro