A. Pressure
B. Composition
C. Temperature
D. All (A), B. and (C)
Related Mcqs:
- Fugacity of a component in an ideal gas mixture is equal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at constant pressure and temperature ____________ as its mole fraction increases?
A. Decreases
B. Decreases exponentially
C. Increases
D. Remain constant - A reasonably general expression for vapour-liquid phase equilibrium at low to moderate pressure is φi yi P = Yi xifi° where, Φ is a vapor fugacity component, Yi is the liquid activity coefficient and fi° is the fugacity of the pure component i. the Ki value (Yi = Ki xi) is therefore, in general a function of ______________________?
A. Temperature only
B. Temperature and pressure only
C. Temperature, pressure and liquid composition xi only
D. Temperature, pressure, liquid composition xi and vapour composition yi - In a homogeneous solution, the activity co-efficient of a component depends upon the_________________?
A. Pressure
B. Composition
C. Temperature
D. All (A), B. and (C) - “The fugacity of a gas in a mixture is equal to the product of its mole fraction and its fugacity in the pure state at the total pressure of the mixture”. This is__________________?
A. The statement as per Gibbs-Helmholtz
B. Called Lewis-Randall rule
C. Henry’s law
D. None of these - Fugacity co-efficient of a substance is the ratio of its fugacity to__________________?
A. Mole fraction
B. Activity
C. Pressure
D. Activity co-efficient - For water at 300°C, it has a vapour pressure 8592.7 kPa and fugacity 6738.9 kPa Under these conditions, one mole of water in liquid phase has a volume of 25.28 cm3 and that in vapour phase in 391.1 cm3.Fugacity of water (in kPa) at 9000 kPa will be__________________?
A. 6738.9
B. 6753.5
C. 7058.3
D. 9000 - Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ______________ with the increase of reduced temperature?
A. Decreases
B. Increases
C. Remains constant
D. Decreases logarithmically - For a stable phase at constant pressure and temperature, the fugacity of each component in a binary system _____________ as its mole fraction increases?
A. Decreases
B. Increases
C. Remain same
D. Decreases linearly - According to Raoult’s law, “The vapor pressure exerted by component in a solution is proportional to the mole fraction of that component.” Raoult’s law is not applicable under the following assumption/condition?
A. No component is concentrated at the surface of the solution
B. The component molecules are non polar and are of almost equal size
C. In the formation of solution, chemical combination/molecular association between unlike
molecules takes place
D. The attractive forces between like and unlike molecules are almost equal - The chemical potential of any constituent of an ideal solution depends on the ______________ of the solution?
A. Temperature
B. Pressure
C. Composition
D. All (A), B. and (C)
