Gas Laws

Question 1

Boyle’s Law

Answer 1

Approximately describes relationship between P and V for a gas

PV = k (k is a proportionality constant)

k = P1V1 = P2V2

Question 2

Charles Law

Answer 2

V and T

V = kT (k is a proportionality constant)

k = V1/T1 = V2/T2

Question 3

Avogadro’s Law

Answer 3

V and n

V = kn (k is constant)

K = V1/n1 = V2/n2

Question 4

Ideal Gas Law

Answer 4

PV = nRT

P = Pressure (atm)
V = Volume (L)
n = number of moles
R = (L * atm)/(mol * K) (0.08206)
T = Temperature (K)

Question 5

Dalton’s Law of Partial Pressures

Answer 5

For a mixture of gasses in a container, total pressure is the sum of pressures that each gas exerts

Ptot = P1 + P2 + P3 … = (n1 + n2 + n3 + … ) (RT/V)

Ptotal, ntotal, Vtotal

X1 = P1/Ptot = n1/ntot = V1/Vtot

Question 6

Gay - Lussac

Answer 6

P1/T1 = P2/T2

Question 7

Combined Gas Law

Answer 7

R = (P1V1)/(n1T1) = (P2V2)/(n2T2)

Mostly used if gas is going from, one state to another