Learning Path
Question & Answer1
Understand Question2
Review Options3
Learn Explanation4
Explore TopicChoose the Best Answer
A
Gas particles are in constant random motion and possess kinetic energy.
B
Gas particles are stationary and do not interact with one another.
C
Gas particles are tightly packed and vibrate in fixed positions.
D
Gas particles have no volume and occupy a definite shape.
Understanding the Answer
Let's break down why this is correct
Answer
The Kinetic Molecular Theory assumes that gas particles are so small that their own volume can be ignored compared with the space they occupy, so the total volume is effectively the volume of the container. It also treats the particles as constantly moving in straight lines until they collide, and that collisions are perfectly elastic so no kinetic energy is lost. Because of these assumptions, the pressure a gas exerts comes from the momentum transferred during collisions with the walls. For example, if you double the number of particles while keeping temperature the same, the collisions with the walls double, so the pressure doubles, which is exactly what the ideal gas law predicts.
Detailed Explanation
The theory says gas particles are always moving in all directions. Other options are incorrect because Some think gas particles are still; Others imagine the particles are packed tightly and vibrate in place.
Key Concepts
Kinetic Molecular Theory
Topic
Ideal Gas Law
Difficulty
easy level question
Cognitive Level
understand
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