CHEM MASTERS Flashcards
Everything around us is made up of
Matter
Air that we breathe is matter
True or false
true
All the matter in the universe originated from the
Big bang
How did the Big Bang create all matter
- During the Big bang large amounts of energy was released
- These bundles of energy formed tiny particles from which all matter was created
Name some types of Energy
- Light energy
- heat energy
- Chemical energy
- Solar energy
- Electrical energy
- Magnetic energy
- Sound energy
The word material is derived from the word
matter
Define matter
Anything that occupies space and has mass
Define Volume
The space occupied by matter
Do atoms usually have an independent existence
NO
Two or more atoms combine to form a
Molecule
The Symbol O represents
The Oxygen atom
This symbol represents
The Oxygen gas which is a molecule made of two atoms of oxygen
Can atoms and molecules be seen with the naked eye or through a simple microscope
NO
name the Indian Philosopher who proposed that matter is made of Atoms almost 2600 years ago
Kannada
In the modern times who proposed that matter is made of Atoms
John dalton
Define INTERMOLECULAR FORCE
Particles of matter are held together by a force of attraction called INTERMOLECULAR FORCE
Particles of matter are always in a Random Motion
True or false
True
The particles of motion that are in Random motion posses a kind of energy called
KINETIC ENERGY
How can we increase the Kinetic energy of the particles
by heating it
Particles of matter have spaces between them called
Intermolecular space
Solids are of two types
- Hard solids
- Soft solids
Solids have how many free surfaces
many
Liquids have how many free surfaces
One
Gases have how many free surfaces
None
List the properties of Solids
- They have a definite volume
- They are Rigid
- They have a definite shape and theyb retain their shape
- Incompressible
- Any number of free surfaces
Gases exert equal pressure on all sides.
True or false
True
Define AIR
Air is a mixture of gases
Define FLUID
All substances that can flow is called a fluid
Give examples of fluids
Liquids and Gases
Do atoms of a solid move
No
They only vibrate about their mean position
What are the two factors that create the different states of matter
- Intermolecular force of attraction
- Intermolecular space
The Random motion of particles are of two types
- Browinian Motion
- Diffusion
Define Brownian Motion
The Zig Zag motion of a particle in a suspended medium is called Brownian motion
What is diffusion
The phenomenon of intermixing of particles of one type with another is called Diffusion
Name the fluid that diffuses very easily
Gases
Liquids diffuse slower than Gases.
True or false
True
What are Miscible Liquids
Liquids that micx with each other
Give an example of Miscible liquids
Water and alcohol
Liquids that dont mix with each other are called
Immiscible liquids
Give an example of Immiscible Liquid
Oil and water
What is the effect of Temperature on Diffusion
When temperature increases the rate of diffusion increases
Why dont solids diffuse under Normal conditions
Solids are very rigid
Give three examples of diffusion
- Leakage of LPG gas
- Red ink in water
- Incense stick
What is INTERCONVERSION OF STATES OF MATTER
Matter can change from one state to another under certain conditions of Temperature and pressure without any change in its chemical properties
Please Take care
Give three examples of Pressure causing a change in State of matter
- under normal conditions the LPG is a a gas but in the cylinder its liquid under high pressure.
- oxygen is a gas but in the oxygen cylinder its liquid under pressure
- The hardest rock under the earths crust melts under high temperature and pressure
What is Sublimation
The conversion of a solid substance to a gaseous state without undergoing a liquid stae on heating
Give examples of sublimation
- Camphor
- Naphthalene
- Iodine
- Dry ice
What is dry ice
Solid Carbon dioxide
Define MELTING POINT
The FIXED TEMPERATURE at which solid changes to a liquid at a given PRESSURE
The Melting point of ice is
Zero degree celsius
The Freezing point of water is
Zero degree celsius
Vaporisation is also known as
Evaporation
Define vaporisation
The process by which a substance changes from a liquid state to a vapour state
Can Evaporation occur at room temperature
Yes
Can Boiling occur at room temperature
No
What is boiling
The change of state from a liquid to a gaseous state by heating.
Boiling is the extreme form of vaporisation
Define Boiling Point
The fixed temperature at which a liquid starts changing to a gaseous state
Define Condensation
The process by which a gaseous state changes to a liquid state is called Condensation
Condensation is also known as
Liquefaction
Define Condensation Point
The definite temperature at which a gaseous state changes to a liquid state
the condensation point of Steam is
100 degree celsius
Freezing is aka
Solidification
Define Freezing
The process by which a substance changes from a liquid to a solid state
Define Freezing Point
The definite temperature at which liquid changes to a solid state
What is THERMAL EXPANSION
All the states of matter expand on heating. This is called Thermal Expansion
This thin glass tube with a small internal diameter is called
Capillary Tube