Home > Uncategorized > Thermodynamics and Kinetics Lecture 11 Notes: Third Law

Thermodynamics and Kinetics Lecture 11 Notes: Third Law

The usual! Today the teacher spends alot of time on derivations. The cost will be 52 minutes.

dS uni=dS sys + dS surr
dU = dQ + dW

A reversible, constant pressure process.
dU = dq rev – pdV
dq rev = TdS
dU = TdS – pdV (only functions of state)

H = U + pV
dH = dU -pdV + pdV + V dP
dH = TdS + V dP

PV = nRT

The third law of thermodynamics stated that entropy is only zero at 0 K. Plank in 1911.

S = R / N avagadro ln Omega
omega is the number of microstates
dS = dU/T + RdV/T

Cp approaches zero as t approaches oK.
dT = dq/Cp
small heat in leads to big changes in temperature

Bond formation releases energy, bond breaking costs energy.

Fire: O2, heat, fuel, chain reaction

Atmosphere: N2, O2, H2O, Ar, CO2, Ne

Prison Handling: search, silence, segregate, speed, safeguard, tag
SALUTE size equipment location unit time equipment
LACE liquid ammo casualties equipment
SPLC staffing probabilities logistics contingencies


MP5 800 rounds/mine
15 and 30 round magazines

Hamming distance between two strings of equal length is the number of

positions at which the corresponding symbols are different.

Z = R + Xi
R is friction, x is inertia
Reactance doesn’t dissapate power

ankle is talus, heel is calcanius.
Big toe is hallux, thumb is pollex palm.

Waxes melt above 45C or 113F. Waxes are hydrophobic. Glycerols have 3

alcohols. Triglycerides have 3 ester groups. Often waxes are found on the

outside of plants to seal and prevent water loss, like C27H56 in apples.

Because plants use wax mixtures, the melting point is lower, which is a

colligative property. Paper can be made waterproof by impregnating it with


weight and drag are overcome by lift and thrust. Increasing the angle of

attack with increase lift, up to the stalling point. Antitorque rotor on

back. Motorcycle like throttle.

Intermolecular bonding: ionic, h bonding, dipole dipole, VdW

A solute will dissolve in a solvent if the solute-solvent forces of

attraction are great enough to overcome the solute-solute and solvent-

solvent forces of attraction.

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