State of Matters
Is the kinetic molecular theory absolute?
No, it is only a theory and not a law.
The term given to the movement of the smoke particle is:
Brownian motion;
the molecule that making up the gas move _______ and _________ at high speed.
quickly and randomly
Why do solids have a definite shape while liquids do not, even though both have fixed volumes?
In solids, strong forces keep particles in fixed positions; in liquids, the forces are strong enough to keep particles close but weak enough to let them slide and take the container's shape.
According to your general knowledge of temperature, what is the freezing point of water?
0 degrees celcius
the molecules making up solid are _________pack in fixed lattice.
closely
According to the kinetic model, what happens to the motion of particles as temperature increases?
The particles gain kinetic energy and move (or vibrate) faster.
What does the kinetic molecular theory inform us about particles and matter in general?
It explains us what happens to matter when the kinetic energy of particles changes.
A model in which matter consist of molecules in motion
Kinetic particle model of matter
Molecules are far apart compared to their size.
Gas
A physical properties that varies with temperature and can be used in a thermometer.
any form: volume of a liquid, expansion, voltage,potential difference, emf, length, colour, pressure, resistance, density
What is a common trait of gases and liquids? A difference?
They both take the shape of their surroundings, and they have enough space between particles to move around slightly. Unlike liquids, gases tend to diffuse and fill up the entire area. (ex. liquid fills up entitled volume in container, but gas fills up entire container)
Brownian motion provides the most direct evidence for
The Kinetic Particle Model of Matter.
molecules are closely pack to each other
solid
As the temperature of the bottle rises the average kinetic energy per molecules will also _____________.
increase
The average kinetic energy of the molecule in a substance is ____________to the temperature of a substance.
proportional
Explain how gas particles exert pressure on the walls of a container.
Pressure is caused by gas particles colliding with the container walls, exerting a force over the area of the walls
What are the main points of the kinetic molecular theory? (there are 3)
1. All matter is made up of very small particles (atoms and molecules). 2. There is empty space between particles. 3. Particles are constantly moving. The particles are colliding with each other and the walls of their container.
Name all the general changes in state that occur in matter please?
Melting, sublimation, evaporation, solidification, deposition, condensation
What cause the pressure against inside the walls of the container?
Cause by the air molecules colliding with the walls.
A syringe is half filled with air and sealed. the plunger is then pulled outward causing the volume of a gas to ______________
Increase