Chapter 7

Question 1

atm = mm Hg = torr

Answer 1

1 atm = 760 mm Hg = 760 torr

Question 2

Standard Temperature and Pressure

Answer 2

273.15 K (0^oC) and 1 atm

Question 3

STP and Standard Conditions

Answer 3

STP used for gas law calculations

SC used for measuing standard Enthalpy, Entropy, Gibbs free energy and voltage

Question 4

Ideal Gases

Answer 4

Occupy no volume

No intermolecular forces

Deviate at low temperature and high pressure

Question 5

Boyle’s Law

Answer 5

Volume inversely proportional to pressure

P₁V₁ = P₂V₂

Question 6

Charles and Gay-Lussac’s Law

Answer 6

V₁/T₁ = V₂/T₂

Question 7

Avogadro’s Principle

Answer 7

n₁/V₁ = n₂/V₂

Question 8

Gas Constant

Answer 8

R = 8.21 x 10^-2 L•atm/mol•K

SI Units = 8.314 J/(K•mol)

Question 9

Density

Answer 9

d = P(MM)/RT

non SC = m/V₂

Question 10

Daltons Law of Partial Pressure

Answer 10

P_T = P_A + P_B + P_C …

Question 11

Partial Pressure of a gas

Answer 11

P_A = P_TX_A

X_A = n_A/n_T

Question 12

Assumptions of Kinetic Molecular Theory

Answer 12

1. Gas particle volume is negligible
2. No intermolecular forces
3. Particles in continous, random motion undergoing collision with other particle and container wall
4. Elastic collisions
5. Average KE is proportional to T of gas and is same for all gases at given temperature

Question 13

Average Molecular Speeds

Answer 13

KE = 1/2mv² = 3/2kT

Question 14

Graham’s Law of Diffusion and Effusion

Answer 14

r₁/r₂ = (MM₂/MM₁)^1/2