4. Ideal gas
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16 Terms
How does a gas in a container apply pressure ?
the gas molecules collide with the wall of the container
What is the relation between volume and pressure of a gas ?
pressure is inversely proportional to volume
What happens when increasing the temperature of a gas.
the particles gain more kinetic energy , they move faster and collide more frequently , pressure increases
What is the relation of temperature and pressure ?
temperature is directly proportional to pressure
State the assumptions of the kinetic theory of gases.
molecules are in constant random motion
the volume of particle is negligible to volume of container
there are no intermolecular forces of attraction
all collisions are elastic
What Is the name of the gases that follows the kinetic theory of gases.
ideal gases
What are the conditions needed to deviate from ideal gas behaviour.
high pressure and low temperature
particles are closer
bonds forms
volume is no longer negligible
they become real gases
State the idea gas behaviour.
PV = nRT
P pressure in Pa
V volume in m3
n number of moles
R ideal gas constant 8.31
T temperature in kelvin
Explain the properties of ionic compounds.
brittle
high melting and boiling point
soluble in water
conduct electricity in molten and aqueous state due to mobile ions
State the properties of metallic structure.
malleable ( layers can slide over each other)
high melting and boiling point
insoluble in water
conduct electricity in solid and liquid state due to delocalised electrons
State the two types of covalent structures ?
giant molecular structure and simple molecular structure
state the properties of simple covalent lattice.
low melting and boiling point (weak intermolecular forces)
most of them are insoluble in water (unless polar)
they do not conduct electricity
State the properties of giant covalent structures.
high melting and boiling point
do not conduct electricity except graphite
insoluble in water
State the 3 examples of giant molecular structure.
graphite (C), silicon dioxide (S , O) , diamond (C)
What makes graphite slippery.
the layers can slide over each other
Why graphite conducts electricity?
they have delocalised electron