What is the value of ln y (where y = activity co-efficient) for ideal gases?
A. Zero
B. Unity
C. Infinity
D. Negative
Answer: Option A
Solution(By Examveda Team)
Since activity co-efficient is defined as$$\eqalign{ & {\gamma _i} = \frac{{{\text{Fugacity in real solution}}}}{{{\text{Fugacity in ideal solution}}}}, \cr & ln{\gamma _1} = \frac{{\overline {n{G^E}_l} }}{{RT}} = 0\left( {{\text{for ideal solution}}} \right), \cr} $$
Since there will be no excess gibbs free energy for ideal solution.
So, in the question it will be better if replace ideal gas by ideal solution.
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
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