Chem 105 ALL Equations

ln(Pvap) (ON RT)

ln(Pvap) = -ΔHvap/R(1/T) + C, slope= - ΔHvap/R

ln(PvapT1/PvapT2)=

ln(PvapT1/PvapT2)= ΔHvap/R(1/T2 - 1/T1), R=8.314

concentration:

amt solute/amt solv,solu

solubility

g solute/ 100 mL solv

molarity

mol sol/L solution

molality

moles solute/kg solvent

ΔHsoln equations (3)

ΔHsoln= ΔHsol + ΔHsolv + ΔHmix

ΔHsoln = ΔHion-ion + ΔHdipole-dipole + ΔHion-dipole (ionic solids)

ΔHsoln = ΔHion-ion + ΔHhydration (solv. in water)

U (lattice E)

U= k(Q1Q2)/d

ΔHion-ion

ΔHion-ion = -U

Cgas

Cgas=kHPgas (C= concentration, kH= Hnerys constant, Pgas= pp of gas)

PA

PA= P°AXA (PA= pp solvent, P°A= VP of solv. XA= mole fraction of solvent)

Ptotal

Ptot= X1P1°+X2P2°… (mixture w/ 1+ volatile component)

ΔTb (ON RT)

ΔTb=iKbm (ΔTb=BP elevation, Kb=BPE constant, m=molality)

ΔTf (ON RT)

ΔTf=iKfm (ΔTf, FP depression, Kf FDP constant, m=molality)

π (ON RT)

π=iMRT (π= osmotic pressure, i= van’t Hoff factor, M= molarity, R=8.314)