Chapter 1 Matter Flashcards
What are the properties of a solid
They have fixed shape
They have fixed volume
What are the properties of liquid
They have no fixed shape
They have a fixed volume
What are the properties of gases
They have no fixed shape
They have no fixed volume
Why do gases have no fixed shape
They particles are far apart and have no forces of attraction
Why are solid have a fixed shape
Because they are closely parked and only vibrate
What happens when liquids are heated
They move faster and attractive forces become weaker and turns gaseous state
Explain the movement of solid and liquids
The liquid close pass each other
The solids vibrate in a fixed position
How are gases molecule arranged
They molecules are far apart
What happens when liquid is cooled
Liquid contract and solidify when cooled
What happens when solids are cooled
They contract and state stays the same
What happen when gases are cooled
Gases condenses to liquid when cooled
What team is used when solids changes to gases
Its called sublimation
What happens when a pure substance is heated
The temperature of a melting solid becomes constant.
State whether melting is a physical or chemical change
Its a physical change because no new substances are formed
Whats the basic unit present in oxygen gas
Oxygen atoms
What basic units in a solid sodium chloride
Sodium and chloride atoms
What basic units found in molten aluminum oxide
Aluminum and oxygen atoms
What is diffusion
Is a process by which move from a region of high concentration to a region of lower concentration until until particles are evenly distributed
In what phase do diffusion occur
In gas and liquid state only
State any two factors affect the rate if diffusion
Temperature
Particle size
Why do wet cloths dry faster in warm days than cold
Because wet cloths gain more kinetic energy from high Tempreture resulting high evaporation and dry faster
Solids lose it shape when melts why
The particles vibrate and gain heat thus there is week forces and the particles slide each other losing shape
Salt dissolves faster in hot water than cold why
They move faster in hot water thus the particles collide with water molecules and dissolve faster
When sugar is added to water when dissolves taste sweet
Because the sugar particles diffuse through out making it sweet
