Chemistry Lect 2

How much space will 1 mol of gas occupy at STP
- 22.4 L
- STP: 0° C and 1 atm
At lower temps, dense gasses ___.

settle below less dense gases
Ideal Gas Law:
- PV = nRT
- R: 0.08206 L atm/K/mol
Ideal Gases
- Make completely elastic collisions
- Exert no forces except to repulsive forces due to collisions
- Molecules have zero volume
- The ave kinetic energy is directly proportional to the temp of the gas
Kinetic Energy Equation for Ideal Gases

K.E. = 3/2 RT
Velocity of Ideal Gas Molecules
- v₁/v₂ = sqrt(m₂) / sqrt(m₁)
- m: mass of the gas molecules
Diffusion/Effusion Rate
- Eff Rate₁ / Eff Rate₂ = sqrt (M₂) / sqrt (M₁)
- M: molecular weight
What causes deviation from ideal gas behavior?

Increased Pressure and Decreased Temps
Chemical Kinetics vs. Thermodynamics
- Kinetics: how fast equilibrium is reached
- Thermodynamics: what equilibrium looks like
What are reaction rates dependent on?
- Temp, Pressure, and Concentration
- T.P.C.
Equilibrium
- the point of greatest entropy
- there is no net change in concentration
- K_eq = products / reactants
Increasing temp ___ the solubility of a salt.
- Increases
- This is always true, even if the rxn is exothermic

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laskiru

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Card Set

Chemistry Lect 2

Description

Gases, Kinetics, and Chemical Equilibrium

Updated

2011-01-10T06:34:20Z

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