Ideal Gasses Flashcards
What is meant by an ideal gas?
A gas which has no intermolecular forces and hence no potential energies
State Boyle’s Law
Pressure of a gas is Inversely Proportional to its Volume
(At otherwise constant conditions)
State Charles’ Law
Volume a gas occupies is Directly Proportional to its Temperature
(At otherwise constant conditions)
State Gay-Lussac’s (Pressure) Law
Pressure of a gas is Directly Proportional to its Temperature
(At otherwise constant conditions)
State Avogadro’s Law
Volume is Directly Proportional to the number of molecules
(At otherwise constant conditions)
What is an empirical law
A relationship derived from experimental data rather than theory
What equation links, molar mass, total mass and number of moles
Total mass = number of moles * molar mass
Define molecular mass
The mass of one molecule of a substance
List 7 assumptions of Ideal gasses
- Gas molecules interact elsatically
- All particles are identical
- There are no intermolecular forces
- Particles motion is random
- Statistically signifcant number of molecules
- Duration of collision is negliable
- Volume of gas is negliable compared to volume of container
Explain why a gas exerts a force on its container
- Gas particles collide with container
- Particle interacts elastically and changes momentum (direction)
- By Newton 2 container must exert a force on the particle
- Hence by Newton 3, the particle must exert and equal and opposite force on the container
- Finally force is distributed over an area which we refer to as pressure
Approximately how many grams does 1 mole of Carbon-12 contain
Approximately 12g
What is Brownian motion
The erratic movement of small particles suspended in a medium (e.g. steam from a hot coffee in the air)
What does Brownian motion evidence and why
The atomic theory since it’s caused by continuous collisions between the particles and the molecules of the surrounding fluid.
