Kinetic Nature of Matter :
Kinetic Nature of Matter Kinetic → “motion”
Kinetic Theory explains the effects of temperature and pressure on matter
3 Assumptions of Kinetic Theory :
3 Assumptions of Kinetic Theory All matter is made of tiny particles called atoms
These atoms are in constant motion
Brownian motion (random motion)
Each particle has kinetic energy
Collisions between particles are perfectly elastic.
Perfectly Elastic Collisions :
Perfectly Elastic Collisions KE = 7 KE = 3 KE = 2 KE = 8 Total Kinetic Energy Before
the collision:
10 Total Kinetic Energy After
the collision:
10 Collision is perfectly elastic;
No kinetic energy is lost overall
Kinetic Molecular Theory &Ideal Gases :
Kinetic Molecular Theory &Ideal Gases Particles in a gas are spread out
In an Ideal Gas, particles are considered to be single points (zero volume)
Particles do have volume, but negligible compared to overall gas volume
In an Ideal Gas, no attraction between particles
Attraction is present, but ignored for an Ideal Gas
Slide 6:
Particles collide with each other and the walls of the container
Collision with walls of container creates pressure
Particles in a gas do not all have identical energy
Average kinetic energy of particles is measured by the gas temperature