Question

which of these observations are not explained by kinetic - molecular theory? when a gas is heated, it expands. at very low temperatures, gases expand less for a given pressure change than they do at high temperatures. if the volume of a gas decreases, its pressure increases at constant temperature. when gas is added to a rigid container, the pressure inside the container increases

Explanation:

Kinetic - molecular theory explains gas behavior based on the motion of its molecules. Heating a gas increases molecular motion causing expansion. Volume - pressure and gas - addition to a rigid - container effects are also explainable by the theory as they relate to molecular collisions. However, the statement about gases expanding less at low temperatures for a given pressure change is not a typical concept directly explained by basic kinetic - molecular theory.

Answer:

At very low temperatures, gases expand less for a given pressure change than they do at high temperatures.