Unit 2 - Simple Particle
Energy and States - part 1
Our spheres are in constant motion and interact with one another by collision
Matter can exist in three phases, which are characterized by the arrangement
of particles. This arrangement affects the density and compressibility of
Particles of matter are in constant motion.
Kinetic energy (Ek) is related to the motion of the particles and is measured by temperature.
Energy is transferred from particle to particle via collisions.
Pressure of gases is explained in terms of the collisions of the particles with the sides of the container.
There are functional relationships between the pressure of a gas and the volume, temperature and the number of gas particles in a container
Dr. Michael M. Krop High School
The top picture shows a balloon filled with a gas at room temperature. The collisions of the gas against the rubber give the balloon its characteristic shape.
The picture below shows the same balloon as liquid nitrogen, with a frigid temperature of -196ºC, is poured on top. The drop in temperature translates into a slowing down of the gas particles inside the balloon. The slower moving particles occupy less volume. This is an example of Charle's Law.
Click on the picture for a video
Unit 2 Materials