Exam 5

Boyle’s Law

Very Polite

P1V1 = P2V2

Charle’s Law

Very Tall

V1/T1 = V2/T2

Avogadro’s Law

Very Nervous

V1/n1 = V2/n2

Combined Gas Law

P1V1/T1 = P2V2/T2

Ideal Gas Law

PV = nRT

Dalton’s Law

Ptotal = Pa + Pb + Pc + Pd

Density of Gases

g/L

Graham’s Law of Effusion

Rate A/ Rate B = MWB/MWA ^1/2

1 atm

101325 Pa

14.7 psi

KE avg =

3/2 RT

rate of diffusion

amount of gas passing through area / unit of time

KE =

½ mv²

diffusion

spreading out, fill a container; homogeneous mixture

effusion

escaping through a small hole in the container

van der Waals equation

(modified Ideal Gas Law)

[P = a(n/v)²] (V - nb) = nRT

a: constant related to attractive forces

b: constant related to volume of gas molecules

specific heat capacity ( c )

amount of heat required to raise the temperature of 1 g of a substance by 1 degree C

total H rxn

BE of reactants - BE of products

standard states

1 atm, 298 K

total H rxn

Hf products - Hf reactants