CHAPTER 7

Monday, September 1, 2008

In Chapters 7, 8 and 9, i learnt more about thermal physics.

Specifically in chapter 7, Kinetic model of matter, i learnt the different properties of solids, liquids and gases.
SOLIDS
-fixed shape and volume.
-normally hard and rigid; a large force is needed to change its shape
-high density
-incompressible
LIQUID
-fixed volume but does not hev fixed shape
-high density
-incompressible
GAS
-no fixed shape or volume
-low density
-compressible

Also, the kinetic model of matter, i learnt that a matter is made up of tiny particles called atoms or molecules.These particles are in continuous motion, also known as kinetic model of matter.

The model of a solid, liquid and of a gas, gets less closely packed respectively, resulting in reducing relative densities.

In a model of solid, particles vibrate about a fixed position and have very strong bonds, resulting in fixed volumes and shapes.

In a model of liquid, particles are free to move about but confined within the vessel containing it and it attractive forces between particles. resulting in liquids having fixed volumes but not fixed shape.

In the model of a gas, particles have very little attraction between them and move about randomly in high speeds. resulting in gases having no fixed volume nor shape and is highly compressible.


Posted by xiaowei aunty at 8:33 PM