termos Flashcards
(46 cards)
Disorder & spontaneous change
S=klnW
Entropy & 2nd Law
ΔS=qrev/T
Entropy & 2nd Law (differentiated)
dS=dqrev/T
Entropy changes of fusion
ΔS=ΔH/Tf
Entropy of vaporisation
ΔS=qrev/Tb
Entropy and Volume
ΔS=nRln(Vf/Vi)
Entropy and Temperature
ΔSm=Cpln(Tf/Ti)
Entropy chnages in surroundings
ΔS=-ΔH/T
Entropy of recation
ΔS=products-reactants
Total Entropy
ΔS=surroudings+system
Gibbs free energy
ΔG=ΔH-TΔS
Gibbs and spontaneity
ΔG<0
Gibbs and pressure
dG=Vdp-SdT
Gibbs and pressure 2
G=G+RTln(P/Pstandard)
Gibbs and temperature
ΔG=products-reactants
ΔG and equillibruin constant k
ΔG=-RTlnk
Van’t Hoff Isochore
lnk=-ΔH/R(1/T)+ΔS/R
Phase Diagrams
dp/dt=ΔH/TΔV
Phase diagrams 2
d(lnp)/dt=ΔH/RT^2
Phase diagrams 3
F = C-P+2
Lennard-Jones Potential
μ=4ε{(σ/r)^2 - (σ/r)^6}
Mixed interactions for size
1/2(σbond1+σbond2)
Mixed interactions for well depth
√εbond1 x εbond2
Trouton’s rule
ΔSvap=10R