Physical Chemistry Third Edition

1304 J Symbols Used in This Book

Symbol Quantity

Ea Activation energy in the Arrhenius expression for a rate constant

F Faraday constant

f Number of independent intensive variables, or variance, given by

the Gibbs phase rule

f Usual symbol for a probability density, especially for molecular

velocity components

fv(v) Probability density for molecular speeds

f Friction coefficient

f Electrostatic factor for diffusion-controlled reaction

f Fraction of collisions leading to reaction

f Tension force of a sample of rubber

F Force

Fi Abbreviation for the chemical formula of substancei

g Probability density for molecular velocity in three dimensions

g Acceleration due to gravity

G Gibbs energy

∆fG◦(i) Gibbs energy change of formation of substancei

G(σ) Surface Gibbs energy

∆Gmix Gibbs energy change of mixing

GE Excess Gibbs energy

H Magnetic field strength

H Enthalpy

∆fH◦(i) Enthalpy change of formation of substancei

∆Hint,i Integral heat of solution of substancei

∆Hdiff,i Differential heat of solution of substancei

H Magnetic field

i Degree of inhibition

i Unit vector inxdirection

I Ionic strength

I Electric current

j Unit vector inydirection

j Electric current density

J Rate of absorption of photons

Ji Diffusion flux of substancei

J Analogue to Gibbs energy

ki Henry’s law constant for substancei

k Force constant

k Usual symbol for a rate constant

k Unit vector in thezdirection

kB Boltzmann’s constant

k(±m) Proportionality constant for the vapor pressure of a volatile

electrolyte

K Kinetic energy

Kd Nernst distribution law constant

Kb Boiling point elevation constant

Kf Freezing point depression constant

K Equilibrium constant

Ka Acid ionization constant

Km Michaelis–Menten constant