hello all!
today, i'll be blogging about
CHAPTER 7 - KINETIC MODEL OF MATTER
7.1
we recap on the different properties ofthe different states of matter:
Matter can exist in 3 different states; solid, liquid and gases.
Solids have stable and a definite shape and volume. They cannot change in shape unless a force is applied to it (such as when being broken or cut). In solids, particles are packed closesly together and cannot move freely. They can only VIBRATE at a fixed position. The movement of energy and temperature is LOW.
Liquids do not have definite shapes. Their shapes are determined by the containers they are contained in. Liquids have definite volumes. The particles are farther apart than that in a solid therefore can slide past each other easily. The movement of energy and temperature is therefore HIGHER then solids
Gases have BOTH indefinite volumes and indefinite shapes. Because the particles in gases are so far apart, they can be compressed and therefore they do not have fixed volumes. They can also move about freely and quickly. The movement energy and temperature is HIGHER than both solids and liquids.
BROWNIAN MOTION
The Brownian motion is a random or irregular motion of smaoke particles in the air.
IT CAN ONLY OCCUR IN FLUIDS (which is a substance that has freely moving particles or the ability to flow)!
the surrounding temperature effects the Brownian motion!
high temperatures: smoke praticles will become vigorous
low temperatures: there is less movement
WHY SO?
When temperature increses, more thermal energy is converted to kinetic energy of air molecules.
This will couse the molecules to move FASTER!
that's all!
HOLLA!
9:07 PM