Van Laar equation deals with the activity co-efficients in binary solutions tern

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Question
Van Laar equation deals with the activity co-efficients in
Options
A. binary solutions
B. ternary solutions
C. azeotropic mixture only
D. none of these

Correct Answer

binary solutions

Chemical Engineering Thermodynamics problems

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1. For a stable phase at constant pressure and temperature, the fugacity of each component in a binary system __________ as its mole fraction increases.
Options
A. decreases
B. increases
C. remains same
D. decreases linearly

3. The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of __________ and COP are the same.
Options
A. kinematic viscosity
B. work
C. temperature
D. none of these

4. The expression, , gives the free energy change
Options
A. with pressure changes at constant temperature.
B. under reversible isothermal volume change.
C. during heating of an ideal gas.
D. during cooling of an ideal gas.

7. "At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero". This follows from the
Options
A. third law of thermodynamics
B. second law of thermodynamics
C. Nernst heat theorem
D. Maxwell's relations

8. Boyle's law for gases states that
Options
A. , when temperature is constant.
B. , when temperature & mass of the gas remain constant.
C. P ? V, at constant temperature & mass of the gas.
D. = constant, for any gas.

10. Pick out the wrong statement pertaining to the decomposition of PCl₅ represented by, PCl₅ ⇌ PCl₃ + Cl₂.Degree of dissociation of PCl₅ will
Options
A. decrease on addition of Cl₂.
B. increase on addition of an inert gas at constant pressure.
C. decrease on increasing the pressure of the system.
D. none of these

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