Gasses Flashcards
What is Charles’ law?
Charles’ law states that the volume of an ideal gas is (at a constant pressure) is directly proportional to its temperature. The formula is
V1/T1 = V2/T2
Example
A 2L balloon at 300K will become a 4L balloon at 600K
2/300 = 4/600
As temperature goes up, volume goes up, as temperature goes down, volume goes down.
What is Avogadro’s Law?
Avogadro’s Law states that when the mols of GAS increase, so does the volume, when it decreases, so does the volume.
Formula:
V1/n1 = V2/n2
What is an ideal gas?
An ideal gas is a hypothetical gas that occupies negligible space and has no interactions, obeying the laws applied perfectly.
What is the formula for the ideal gas law?
PV = nRT
P = Pressure (atm)
V = Volume (L)
n = Mols of gas (mols)
T = Temperature (k)
R = Ideal gas constant (0.08206)
Which formula should you use when asked to find one of the following and given the rest:
Volume, Temperature, Pressure, Moles of Gas
Example:
How many mols of “x” should be placed in a “y”ml container at “z”k to produce a pressure “a”kpa?
Ideal gas law
PV = nRT
P = Pressure (atm)
V = Volume (L)
n = Mols of gas (Mols)
T = Temperature (K)
R = Ideal gas constant (0.08206)
What is the combined gas law?
The combined gas law is the following formula:
If the moles of gas change:
P1V1/n1T1 = P2V2/n2T2
If mols do not change:
P1V1/T1 = P2V2/T2
In what types of problems should you use combined gas law?
When you’re given that you have a gas and are asked to find one of the following but are given the rest and the values change (an original volume that’s given is compressed to a new volume that’s given):
Mols of gas (not always given or found), Volume, Temperature, Pressure
What is STP?
Standard temperature pressure
Standard temperature: 273K
Standard pressure: 1atm
How much volume does 1 mol of gas take up at STP?
1 mol of gas = 22.4L of volume
