Gases Flashcards
1
Q
Volume
A
(Liters; 1cm^3= 1mL)
2
Q
Ideal Gas Law Assumptions:
A
- Gas molecules have no volume( Good @ low P)
2. No intermolecular attractions between molecules( all collisions are elastic) —–Good @ high T
3
Q
Pressure
A
1atm=760 torr = 760 mmhg
4
Q
STP
A
0 Celcius and 1 atm
5
Q
1 mole of gas =
A
22.4L @ STP
6
Q
Ideal Gas Law Formula
and when is it most accurate in?
A
PV=nRT
most accurate at low pressures, high temp, or gases w low intermolecular forces.
7
Q
Boyle’s Law
A
P ~ 1/V
PV= constant
If pressure is 1/5, then volume is 5 times bigger
If one goes up, the other goes down.
8
Q
Charle’s Law
A
V ~ T
If temperature doubles, volume doubles.
9
Q
Avogadro’s Law
A
V ~ n
V/n = constant.
10
Q
Combined gas law:
A
P1V1/n1T1 = P2V2/n2T2
11
Q
Dalton’s Law of partial Pressures:
A
Ptot = Pa + Pb
12
Q
Gas Density Formulas:
A
d= m/V and M=m/n
13
Q
Graham’s Law of Effusion
A
r2/r1 = square root of M1/M2
