Fugacity and pressure are numerically not equal for the gases__________________?

Related Mcqs:

1. 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...

2. Fugacity and pressure are numerically equal, when the gas is____________________?

   A. In standard state B. At high pressure C. At low temperature D. In ideal state...

3. “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...

4. 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...

5. 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...

6. 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...

7. Fugacity co-efficient of a substance is the ratio of its fugacity to__________________?

   A. Mole fraction B. Activity C. Pressure D. Activity co-efficient...

8. As pressure approaches zero, the ratio of fugacity to pressure (f/P) for a gas approaches____________________?

   A. Zero B. Unity C. Infinity D. An indeterminate value...

9. The activity of an ideal gas is numerically ____________ its pressure?

   A. More than B. Less than C. Equal to D. Data insufficient, can’t be predicted...

10. At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by (where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.) ?

    A. μ° + RT ln f B. μ°+ R ln f C. μ° + T ln f D. μ° + R/T ln f...