Which of these describes a situation where gases are ideal according to the Kinetic Molecular Theory of gases?

#A)# The gas molecules are far apart and moving quickly.
#B)# The gas molecules are close and sticky.
#C)# The gas molecules are at high pressures.
#D)# The gas molecules are at low temperatures.

1 Answer
Dec 26, 2016

Answer:

The correct answer is A. This is a limitation of the Kinetic Molecular Theory.

Explanation:

A. This is a limitation of the Kinetic Molecular Theory.

Correct! The Kinetic Molecular Theory assumes that the molecules are far apart and travelling at high speeds.

B.

Wrong! See the answer to A.

C. and D.

Wrong! This describes real gas behaviour.

Real gases deviate from ideal behaviour at high pressures and low temperatures because the molecules have a real volume and are attracted to each other.