Question

At constant temperature, the behavior of a sample of a real gas more closely approximates that of an ideal gas as its volume is increased because the:_________

(A) Collisions with the walls of the container become less frequent
(B) Average molecular speed decreases
(C) Molecules have expanded
(D) Average distance between molecules becomes greater
(E) Average molecular kinetic energy decreases

Answer 1

The behavior of a sample of a real gas more closely approximates that of an ideal gas as its volume is increased because the average distance between molecules becomes greater.

Step-by-step explanation:

The behavior of a sample of a real gas more closely approximates that of an ideal gas as its volume is increased at constant temperature because the average distance between molecules becomes greater. In an ideal gas, the molecules are assumed to have zero volume, while in real gases, the molecules have small but measurable volumes. As the volume of the gas increases, the intermolecular distances become larger, reducing the frequency of molecule-wall collisions. This behavior is described by Avogadro's law, which states that increasing the number of gas molecules requires a proportional increase in the container volume to yield a constant number of collisions per unit wall area per unit time.

Answer 2

Answer: D

Step-by-step explanation:

The molecular theory of gases states that there are no intermolecular forces between gases. Gas molecules are separated from each other such that individual molecules are far apart from each other. When volume is increased, gas molecules spread out from each other and the distance between them increases thus approximating the situation in ideal gases.