Chapter 10 & 11 Flashcards
gas symbol for mol
n
4 units of pressure
atm (atmosphere)
Torr
mm Hg
in. Hg
exact conversions between the pressure units
1 atm = 760 Torr = 760 mm Hg
What formula describes the relation between the V & # n in gas sample @ constant P & T?
Avogadro’s Law; V₁/n₁ = c = V₂/n₂
def diffusion & its 2 rules
Graham’s Law of Diffusion: diffusion = high-concentrate gas spreads throughout container
increases w/ T & Avg. Kinetic E
smaller mol = higher velocity & faster spread
Def Charles’ Law
The V of an ideal gas is directly proportional to its absolute T @ constant P and # n, or:
V₁/T₁ = c = V₂/T₂
Def Boyle’s Law
P of a gas is inversely proportional to V when T & n of gas = constant.
P = c(1/v)
Or V₁P₁ = c = V₂P₂
Def Ideal Gas Law
PV = nRT R = gas constant
what is the annotation & value of the standard temp & pressure for gases?
Tₛₜₚ = 0°C = 273.15 K Pₛₜₚ = 1 atm = 760 Torr = 760 mm Hg
combined gas law
(P₁V₁)/T₁ = (P₂V₂)/T₂, ONLY IF N IS CONSTANT
IT COMES FROM THE IDEAL GAS LAW TOO OK
formula for density of gases
PM/RT
R = gas constant
M = molar mass of gas
def Dalton’s law of partial pressures
In a gas mix of O₂, N₂, & He₂
Pₐₗₗ ₑₗₑₘₑₙₜₛ = Pₕₑ + Pₙ₂ + Pₒ₂
formula of χₑₗₑₘₑₙₜ
nₑₗₑₘₑₙₜ/nₐₗₗ ₑₗₑₘₑₙₜₛ
2 formulas for partial pressure
Pₑₗ. = χₑₗ. * Pₐₗₗ ₑₗ.ₛ = (nₑₗ./nₐₗₗ ₑₗ.ₛ) * Pₐₗₗ ₑₗ.ₛ Pₑₗ.V = nₑₗ.RT
formula for gas speed in kinetic energy
Kinetic E = ½mass*velocity²
