Ideal Gases Flashcards
Motion of individual gas molecules
~Molecules are in constant motion and collide with each other and the walls of the container.
~There are forces of attraction between molecules.
~Molecules in a gas move at different speeds.
Ideal gas
Is a hypothetical gas that obeys the gas law under all the condition of temperature and pressure
Properties of an ideal gas
~ occupy no volume
~exert no force on each other(no intermolecular forces) except during a collision, all the collision between gas molecules are completely elastic
~are identical in all ways
Kinetic molecular theory
~all matter is made up of particles which are atoms, molecules and ions
~the particles move continually and move in a straight line except when they collide with each other or the wall of the container
~There are empty space between the particles
~Molecules in a gas are so small that occupy zero volume
~force of attraction exists between the particles of a gas when they are relatively close to each other
~force of repulsion occur when particles come close to each other
The ideal gas law
The amount of a gas is determined by its pressure, volume and temperature
Real gas
A gas that occurs in nature and will not obey pv=nRT, especially at high pressure and low temperatures
Pressure
Arises from the collisions of the particles with the walls of the container (depends on the frequency of the collisions per unit area)
Temperature
A measure of the average kinetic energy of the particles
Temperature
A measure of the average kinetic energy of the particles
Volume
The space occupied by the gas in the container
Boyle’s law
The pressure of an enclosed gas is inversely proportional to the volume it occupies at constant temperature.
When will a real gas show an ideal behavior
At high temperature and low pressure
When will a real gas (deviate) from ideal gases /exhibit a non ideal behavior
Low temperature and high pressure
