Chapter 5 Equations

Question 1

Boyle’s Law

Answer 1

P1V1=P2V2 (inversely related)

Question 2

Charles’s Law

Answer 2

V1/T1 = V2/T2

Question 3

Gay-Lussac’s Law

Answer 3

P1/T1=P2/T2

Question 4

Avogadro’s Law

Answer 4

V1/n1=V2/n2

Question 5

Combined Gas Law

Answer 5

(P1V1)/T1 = (P2V2)/T2

Question 6

Ideal Gas Law

Answer 6

PV=nRT

Question 7

Molar mass of a gas

Answer 7

(dRT)/P

OR

grams/moles

Question 8

Density of a gas

Answer 8

D = (P x MM)/RT
At 1 STP<
D = MM/22.4 L

Question 9

Dalton’s Law of Partial Pressures

Answer 9

Ptotal = P1 + P2 + P3…..

Question 10

Mole Fraction

Answer 10

n1/ntotal or p1/ptotal

Question 11

Kinetic Energy

Answer 11

KE = (3/2)RT

Question 12

Root mean square velocity

Answer 12

urms = Square root of (3RT)/M (mass in kg)

Question 13

Graham’s Law of Effusion

Answer 13

Rate of effusion 1/Rate of effusion 2 = Square root M2/square root M1(molar mass 1)

Question 14

Charles’ law vs. Gay-lussac’s law

Answer 14

Charles’ law describes temperature increase in a flexible container, where increasing pressure = increase root mean square velocity = increased collisions = increased pressure which increases volume to achieve equilibrium with the outside pressure, decreasing pressure to do so, whereas Gay-lussac’s law is in a rigid container where increased temperature just increases pressure