Physical Chemistry

P = Pressure ; V = Volume ;  a , b = Dieterici Constants ; n= Number of Moles ; R= Universal Gas Constant ; T= Temperature

I = Ionic Strength ; z =  Charge number of  an ionic specie ; f = Activity coefficient ;

A= A  constant that depends on temperature.
(A is assumed to be 0.509 mol^-1/2 kg-1/2 which corresponds to water at 25^oC)

ΔH= Enthalpy Change ; ΔU = (U_final - U_initial) Internal Energy Change;  ΔV = (V_final - V_initial)Volume Change;

I = Ionic Strength ; c_i =  concentration of the i^th ion ; z_i = Charge of the i^th ion

K_eq = Equilibrium Constant of Adsorbtion;  P = Partial Pressure or Concentration of the absorbate;  θ = The fraction of adsorbent surface covered by adsorbate

C_aH_bO_cN_d = Molecular Formula of Fragment ; a , b, c & d must be an positive integer or 0 (zero) 

Use this calculator to predict the molecular fragment obtained in a Mass Spectra.

ΔG^o= Standard Free Energy Change ; R = Universal Gas Constant;  K_eq = Equilibrium Constant; T= Temperature

E= Energy at the n^th state; n = quantum number ; h= Plank's constant ; m = mass of the particle;   L= Box length 

M=Molarity of the Solution ; W_solute = Weight of the Solute ; V = Volume of the solution; M_w = Molecular Weight of the solute;