P3-Particle Model of Matter

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  • Created by: Bootsy
  • Created on: 07-03-18 17:39

The Particle Model and Motion in Gases

All matter is made up of particles. The three states of matter are solid, liquid and gas. The arragement and energy of the particles are different.

SOLIDS= strong forces of attraction hold the particles close together in a fixed, regualr arrangement. They don't have much energy so they can only vibrate about their fixed positions

LIQUIDS= there are weaker forces of attraction between the particles. They are close together but can move past each other and form irregular arrangements. They have more energy than the particles in a solid- they move in random directions at low speed.

GASES= there are almost no forces of attraction between the particles.They have more energy than in liquids and solids- they are free to move and are constantly moving in random directions and speeds.

Colliding gas particles create pressure and increasing the temperature of a gas can increase its pressure.

Density of Materials

The partical material can explain density. The density of a material depends on what it's made of and how its particles are arranged

DENSITY= MASS / VOLUME

Practical=

TO FIND THE DENSITY OF A SOLID OBJECT:Use a balance to measure its mass. If it is a regular solid, start by measuring its length, width and height with an appropriate peice of equipment. Then calculate its volume using the relevant formula for that shape. For an irregular solid you should find the volume by submerging it in a eureka can filled with water. The water displaced by the object will be transferred to the measuring cyclinder. Record

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