Ideal Gas Laws Flashcards
(7 cards)
1
Q
What assumptions are made in the Ideal Gas Model?
A
- gas contains large number of atoms moving in random directions with random speed
- Volume occupied by particles is negligible compared to volume of the gas
- Collisions with walls and other molecules are elastic
- Duration of collisions is negligible when compared to time between collisions
- Electrostatic forces between molecules are negligible except during collisions
2
Q
Why is there a pressure exerted on container walls when contains gases?
A
- Atoms collide with walls
- change in momentum gives rise to force on atom
- Newtons 3rd law dictates there is opposite force active on wall of same magnitude
- force is present over small area
- pressure is introduced
3
Q
What is Boyles law?
A
- Under constant temperature
- Pressure of gas is inversely proportional to its volume
4
Q
What is Gay Lussac’s Law?
A
- Under constant volume
- Pressure is directly proportional to temperature
5
Q
What is Charles’ Law?
A
- Under constant pressure
- Volume of gas is proportional to temperature
6
Q
What is the equation of state of an ideal gas?
A
- pV = nRT
- n is number of moles
7
Q
What is the equation for root mean square speed?
A
- pV = 1/3 (Nm(rms)^2)
- N = number of molecules of gas
- m = mass of a molecule of gas
- can be found from Molar mass (M)/Avogadros constant (Na)
