Unit 5: states of matter
States of matter revisited : :
Explaining Diffusion
Explaining gas pressure
Pressure is force per unit area-Aaditya
Diffusion-Mahan
Higher the temperature, the greater the gas pressure. Nitvesh
Liquid: follows the shape of the container -Sarah Tan
eunice: diffusion happens fastest in gas**
liquid
Particles collide with each other. – Sivani
Speed of diffusion depends on temperature. - Hanson Tan
Anuj: Gas
Oxygen changes from liquid state to solid state at -218ºC. - Sarah A
- Can flow
Particles move... energy - Aabir
Can compress
air pressure-Trevor Lim Yong Guan
Take shape of the container
The Spread of Gas - Adam
Warmer Particles diffuse faster than colder ones; they have more energy - Adam
Bani: liquid oxygen boils at -183'C
movement and mixing... - Aabir
eunice; solid particles are tightly packed*Link Title
Difusion happens slowest in solids-Joon
Diffusion in gas = Quickly - Aabir
balloons (good example, gas pressure)- Trevor Lim Yong Guan
Eg; the more you blow into a balloon, the greater air particles would be inside
Anoshka 8G
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Bani: Robert Brown
Volume=Volume of container
balloon+pressure=expand-Trevor Lim Yong Guan
takes the shape of the container, but it's volume does not change
- Sara
Explaining density
Particle size and mass affects speed of diffusion.- Hanson Tan
Factors that determine diffusion: Temperature, size and mass of particles, state of matter. – Sivani
cannot be compressed
- sara
Bani: Al-Biruni of Persia
:
Can Flow -Joon
Slightly packed together, but allows small movement (Osmaan)
At higher temperatures, particles move faster than in lower temperatures_Ryan Woon
Anuj: Ice
Solid state - Aabir
Temperature can effect Air Pressure-Adam
Density of substance depends on: Mass of its particles, how closely packed -Mia
Solid = Fixed shape
Fixed volume
Amzhar: Density is how heavy an object is for its size.
Ice can float; Particles are closer at 0'C
Solid = Cannot be compressed
Speed of diffusion_Ryan Woon
Diffusion happens very slowly (if at all) in solids - Anoshka
Bani: The higher you are (eg mountain) the less air pressure there is the lower you (eg under the sea) the more air pressure there is.
Solid = cannot flow
the equalization of concentration-Trevor Lim Yong Guan
Diffusion happens fastest in a gas. – Sivani
Strong attractive forces between particles
Amzhar: Density is measured in g/cm^3
Diffusion in liquids is slower than gas - Khisshan
Particles are loosely packed. Nitvesh
eunice: liquid has a greater density than gas
(Robert brown: Bani)
Anuj: Density= Mass/Volume
Volume= Height X Length X Width
Solid oxygen (O) = Pale blue!
Amzhar: The formula for density is mass/volume
The lowest temperature an object can reach is -273.15 degrees Celsius - Osmaan Jaka
Density depends on mass of particles and how closely packed particles are. NItvesh
Ice floats on water because it has a lower density -Anoshka
Trevor:
solids=strongest force of attraction-Trevor Lim Yong Guan
solids vibrate on spot-Trevor Lim Yong Guan
Amzhar: Some factors that affect diffusion are mass of solute, temperature of enviroment, density of solvent, etc
Mass (g)
Gas Pressure= the force exerted by gas particles when they collide with one metre square of surface_Ryan Woon.
gases= weakest force of attraction-Trevor Lim Yong Guan
please DON'T change my work
- Trevor Lim Yong Guan
Eg: carbon dioxide, oxygen - Anoshka
Solids = Vibrate on spot
Amzhar: Gas- can be compressed, weak forces of attraction, can flow, etc
Al-Biruni of Persia (bani)
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Jia Quan
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Particles do not move
Solids particles - Anoshka
gas particles = far apart-Trevor Lim Yong Guan
-Trevor Lim Yong Guan
solid particles= close together- Trevor Lim Yong Guan
liquid particles= arranged in an irregular pattern- Trevor Lim Yong Guan
Jia Quan
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-Trevor Lim Yong Guan
- Trevor Lim Yong Guan
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Diffusion= the spreading out and mixing of particles from areas with many particles to areas with fewer particles_Ryan Woon
Jia Quan
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We can explain Diffusion using knowledge on particles_Ryan Woon
Density=the mass of a substance in a certain volume. A substance with a high density feels heavy for its size_Ryan Woon
A force of attraction is any type of force that cause two objects to come together :Stefan
Examples:
Gravitational Force
Electric force also known as electrostatic force
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