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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