Gibbs-Duhem equation relates composition in liquid phase and the __________ at constant temperature & pressure.
A. Fugacity
B. Partial pressure
C. Activity co-efficient
D. A, B, and C
Answer: Option D
Solution(By Examveda Team)
The Gibbs–Duhem equation is given as $$\sum {} _{i\, = \,1}^n\,\,{n_i}d{\mu _i} = + vdP - sdT$$ at constant temperature and pressure it simply becomes $$\sum {} _{i\, = \,1}^n\,\,{n_i}d{\mu _i} = 0,$$ which tells us that the chemical potential of an specie is not entirely independent on chemical potential of other species and also relates chemical potential with composition if we write this in terms of fugacity and activity co-efficients it will relate them with composition to.Related Questions on Chemical Engineering Thermodynamics
A. Maxwell's equation
B. Thermodynamic equation of state
C. Equation of state
D. Redlich-Kwong equation of state
Henry's law is closely obeyed by a gas, when its __________ is extremely high.
A. Pressure
B. Solubility
C. Temperature
D. None of these
A. Enthalpy
B. Volume
C. Both A & B
D. Neither A nor B
Join The Discussion