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AP Chemistry Practice Quiz: Deviation from Ideal Gas Law

Written by AP Content Team, Verified for 2026 AP Exams, Last updated: May 2026

Test your understanding with short quizzes. This quiz has 7 questions to check your progress.

Question 1 of 7

According to the provided text, what are the two primary factors that cause real gases to deviate from ideal gas behavior?

All Questions (7)

According to the provided text, what are the two primary factors that cause real gases to deviate from ideal gas behavior?

A) Interparticle attractions and particle volumes

B) Particle mass and kinetic energy

C) Container shape and temperature

D) Elastic collisions and random motion

Correct Answer: A

The text explicitly states that deviations from the ideal gas law can result from 'interparticle attractions' and from 'particle volumes'.

Under which condition do interparticle attractions become a particularly significant cause for a real gas to deviate from the ideal gas law?

A) At very high temperatures

B) At very low pressures

C) Near the gas's condensation point

D) When the gas is in a large volume container

Correct Answer: C

The content specifies that deviations resulting from interparticle attractions are especially pronounced 'near condensation'.

The volume of the gas particles themselves causes the most significant deviation from ideal behavior under which of the following conditions?

A) At very high pressures

B) At very low temperatures

C) Near the condensation point

D) When interparticle forces are negligible

Correct Answer: A

The provided text states that deviations resulting from 'particle volumes' are especially significant 'at very high pressures'.

At extremely high pressures, the behavior of a real gas deviates from the ideal gas law primarily because...

A) the interparticle attractions become the only significant force.

B) the volume occupied by the gas particles is no longer insignificant.

C) the kinetic energy of the particles approaches zero.

D) the gas immediately condenses into a liquid.

Correct Answer: B

The provided content directly links 'very high pressures' with deviations resulting from 'particle volumes'. At high pressures, the space taken up by the particles themselves becomes a significant fraction of the container's total volume, which is a key cause of non-ideal behavior.

A real gas is cooled to a temperature just above its condensation point. Which factor is the primary reason for its deviation from ideal behavior under these conditions?

A) The negligible volume of the individual gas particles.

B) The high kinetic energy of the particles.

C) The interparticle attractive forces.

D) The perfectly elastic collisions between particles.

Correct Answer: C

The text states that deviations from 'interparticle attractions' are especially significant 'near condensation'. Cooling a gas brings it closer to its condensation point, making these attractions the primary cause for non-ideal behavior.

The non-ideal behavior of real gases highlights the limitations of which core assumptions of the ideal gas law?

A) Gas particles are in constant, random motion.

B) The temperature of a gas is proportional to its average kinetic energy.

C) Gas particles have no volume and experience no interparticle forces.

D) Collisions between gas particles are perfectly elastic.

Correct Answer: C

The provided text identifies 'particle volumes' and 'interparticle attractions' as the causes of non-ideal behavior. These directly contradict the ideal gas law's key assumptions that particles are point masses (have no volume) and exert no forces on one another.

Based on the factors that cause deviation from ideal behavior, under which set of conditions would a real gas behave most ideally?

A) High pressure and high temperature

B) High pressure and low temperature

C) Low pressure and high temperature

D) Low pressure and low temperature

Correct Answer: C

Ideal behavior is approached when the causes of deviation are minimized. Low pressure minimizes the effect of particle volume (as the container volume is vast compared to particle volume). High temperature gives particles high kinetic energy to overcome interparticle attractions. Therefore, low pressure and high temperature are the most ideal conditions.