Identify State
Theory
Evidence of Theory
Changing State
Heating and Cooling Curve
100
Identify the state of matter below:
Solid
100
What is Matter?
Matter is anything that has mass and volume
100
The spreading out of perfume in a room demonstrates this process.
Diffusion
100
When a solid is heated, its particles gain this.
Kinetic Energy
100
On a heating curve, a flat section indicates what?
A change of state.
200
Which state of matter has no fixed shape but has a fixed volume?
Liquid
200
According to the theory, all matter is made up of these.
Particles
200
Ice melting shows that particles can ______.
Change arrangement or gain energy
200
The process by which a liquid changes to gas at the surface.
Evaporation
200
Define ‘Melting Point’
The melting point of a substance is the temperature at which it changes state from solid to liquid.
300
Particles in this state move freely and spread to fill their container. Identify the state of matter.
Gas
300
The strength of this between particles determines whether a substance is solid, liquid, or gas.
Forces of Attraction
300
The brown gas nitrogen dioxide spreading through air provides evidence for what property of particles?
Constant motion / diffusion
300
Explain what happens to the forces of attraction when ice melts.
They weaken as particles gain energy and move apart.
300
What happens to particle motion as temperature rises in the solid region of the curve?
Particles vibrate faster around fixed positions.
400
Identify the state of matter below:
Solid
400
In which state are particles arranged in a fixed lattice structure?
Solid
400
The experiment using ammonia and hydrogen chloride gases in a tube produces what evidence of particles moving?
Formation of a white ring of ammonium chloride closer to the HCl side due to diffusion.
400
Below are images showing dry ice being used at events. Identify the name of change of state being demonstrated in the diagrams below.
Sublimation
400
In a cooling curve, the flat region represents what happening?
A change of state with heat loss while temperature remains constant.
500
Name two property that distinguishes gases from liquids.
Compressibility / Arrangement of particles / volume not fixed / diffusion rate
500
State 3 of the main points of the particulate theory.
-Matter is made up of tiny particles.
-Particles are in constant motion and temperature affects the speed of motion.
-Particles have spaces between them.
-Forces of attraction exist among particles.
500
Give and define two pieces of experimental evidence that matter is made of particles.
Diffusion - movement of particles from a place of high concentration to a place of low concentration until evenly distributed.
Osmosis - movement of water molecules from a place of high concentration to a place of low concentration across a selectively permeable membrane until evenly distributed.
500
Why does heating a liquid cause it to boil?
Particles gain enough energy to overcome intermolecular forces and escape as gas.
500
Identify on the diagram where “liquid and vapor” falls.
