Chemical Engineering MCQs

Page No. 71

Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The ratio of chemical potential to free energy of a pure substance at constant temperature and pressure is________________?


a0


b1


c


dNone of these


View Answer 1

A cyclic engine exchanges heat with two reservoirs maintained at 100 and 300°C respectively. The maximum work (in J) that can be obtained from 1000 J of heat extracted from the hot reservoir is_________________?


a349


b651


c 667


d1000


View Answer 349

A gas mixture of three components is brought in contact with a dispersion of an organic phase in water. The degree of freedom of the system is______________?


a3


b4


c5


d6


View Answer 3

In Joule-Thomson porous plug experiment, the__________________?


aEnthalpy does not remain constant


b Entire apparatus is exposed to surroundings


cTemperature remains constant


d None of these


View Answer None of these

There is a change in ______________ during the phase transition?


aVolume


bPressure


c Temperature


dAll a, b & c


View Answer Volume

Cv is given by__________________?


a(∂E/∂T)V


b (∂E/∂V)T


c(∂E/∂P)V


d(∂V/∂T)P


View Answer (∂E/∂T)V

The equation relating E, P, V and T which is true for all substances under all conditions is given by (∂E/∂V)T = T(∂P/∂T)H – P. This equation is called the ___________________?


aMaxwell’s equation


bThermodynamic equation of state


cEquation of state


dRedlich-Kwong equation of state



The standard Gibbs free energy change of a reaction depends on the equilibrium______________________?


aPressure


bTemperature


cComposition


d All A, B. and C


View Answer Temperature

The molar excess Gibbs free energy, gE, for a binary liquid mixture at T and P is given by, (gE/RT) = A . x1. x2, where A is a constant. The corresponding equation for ln y1, where y1 is the activity co-efficient of component 1, is__________________?


a A . x22


bAx1


cAx2


d Ax12


View Answer A . x22

For an isothermal process, the internal energy of a gas____________________?


aIncreases


bDecreases


cRemains unchanged


dData insufficient, can’t be predicted


View Answer Remains unchanged

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