Which laboratory observation would most support the kinetic theory's assumption that gas molecules have little attraction for one another?
A) A gas expands when the pressure on it is released.
B) A gas with a lower formula mass diffuses more rapidly than one with a higher formula mass.
C) A gas exerts the same pressure on each part of a container's wall.
D) A gas has mass.

Question

Quizplus · Accepted Answer

The kinetic theory assumes that gas molecules move freely and have little attraction for one another, which is supported by the observation that a gas expands when the pressure on it is released. This expansion indicates that the molecules are not strongly attracted to each other and will spread out to fill the available space when not constrained.

Which Laboratory Observation Would Most Support the Kinetic Theory's Assumption