Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
6 Cards in this Set
- Front
- Back
|
Kinetic model of matter |
Kinetic model of matter: it states that the tiny particles that make up matter are always in continuous random motion. |
|
|
Solid: Closely packed together, in regular pattern Large number of particles per unit volume, resulting in high density. They vibrate about fixed positions. Held in position by strong attractive forces between the particles, giving it fixed volumes and shapes |
Liquid: Random arranged, particles slightly further apart than solid. High density Particles are free to move within the liquid. The are attractive forces between the particles. |
|
|
Gas: Random arranged and far apart. Low densities. Very little attraction between them and move about randomly. |
Brownian motion: refers to the observed random movement of particles in a fluid. Particles move around randomly because air molecules are bombarding them randomly. |
|
|
Factors affecting Brownian motion: Temperature- When temperature is increased the particles move faster, when temperature is decreased, particles move slower. It is due to the fact that the temperature of the air affects the average speed of air molecules which thus affects the impact of air molecules on smoke particle.Hence, smoke particles will move fast and change direction more frequently. |
Pressure: Moving gas collide with the surface and exert a force on it. The force exerted per unit area is thus called gas pressure. |
|
|
Pressure of fixed mass of gas is directly proportional to its temperature, provided its volume remains constant. |
Pressure of a fixed mass of gas is inversely proportional to its volume, provided the temperature remains constant. |
|
|
Volume of a fixed mass of gas is directly proportional to its temperature provided the pressure remains constant. |
the end 0l0l0l |
