Chemical Engineering MCQs

Page No. 159

A gas shows deviation from ideal behaviour at______________?


aLow pressure and high temperature


bLow pressure and low temperature


c Low temperature and high pressure


dHigh temperature and high pressure



The Maxwell relation derived from the differential expression for the Helmholtz free energy (dA) is________________?


a(∂T/∂V)S = – (∂P/∂S)V


b(∂S/∂P)T = – (∂V/∂T)P


c (∂V/∂S)P = (∂T/∂P)S


d(∂S/∂V)T = (∂P/∂T)V



Specific heat of a gas for a reversible adiabatic process is________________?


aNegative


bZero


cInfinity


dNone of these


View Answer Zero

Heat requirement for decomposition of a compound into its elements is _____________ that is evolved during the formation of that compound from its elements?


aThe same


bLess than


cGreater than


dDifferent than


View Answer The same

For an ideal gas, the chemical potential is given by______________?


aRT d ln P


bR d ln P


cR d ln f


dNone of these


View Answer RT d ln P

The thermodynamic law, PVy = constant, is not applicable in case of______________?


a Ideal compression of air


bFree expansion of an ideal gas


cAdiabatic expansion of steam in a turbine


dAdiabatic compression of a perfect gas



During the phase transition, _______________ changes?


aPressure


bVolume


cTemperature


dAll A , B. and C


View Answer Volume

Clausius-Clapeyron equation is applicable to _____________ equilibrium processes?


a Solid-vapor


b Solid-liquid


cLiquid-vapor


dAll A, B. and C


View Answer All A, B. and C

The four properties of a system viz. P, V, T, S are related by ______________ equation?


aGibbs-Duhem


bGibbs-Helmholtz


cMaxwell’s


dNone of these


View Answer Maxwell’s

is desired to bring about a certain change in the state of a system by performing work on the system under adiabatic conditions ?


aThe amount of work needed is path dependent


bWork alone cannot bring out such a change of state


cThe amount of work needed is independent of path


d More information is needed to conclude anything about the path dependence or otherwise of the work needed



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