Chemical Engineering Thermodynamics MCQs

Question 1

The value of Joule-Thomson co-efficient, in case where cooling occurs after the throttling process is

Accepted Answer

+ve

Answer

0

Answer

∞

Answer

-ve

Question 2

Fugacity is a measure of the

Accepted Answer

Escaping tendencies of the same substance in different phases of a system

Answer

Relative volatility of a mixture of two miscible liquids

Answer

Behaviour of ideal gases

Answer

None of these

Question 3

Fugacity is most helpful in

Accepted Answer

Representing actual behaviour of real gases

Answer

Representing actual behaviour of ideal gases

Answer

The study of chemical equilibria involving gases at atmospheric pressure

Answer

None of these

Question 4

As the entropy of the universe is increasing, day by day, the work producing capacity of a heat engine is

Accepted Answer

Decreasing

Answer

Not changed

Answer

Increasing

Answer

Data sufficient, can't be predicted

Question 5

Which of the following is not an equation of state?

Accepted Answer

Clausius Clayperon equation

Answer

Bertholet equation

Answer

Beattie-Bridgeman equation

Answer

None of these

Question 6

Pick out the wrong statement.

Accepted Answer

Enthalpy and internal energy change is zero during phase change processes like melting, vaporisation and sublimation

Answer

Minimum number of degree of freedom of a system is zero

Answer

Degree of freedom of a system containing a gaseous mixture of helium, carbon dioxide and hydrogen is 4

Answer

For a two phase system in equilibrium made up of four non-reacting chemical species, the number of degrees of freedom is 4

Question 7

Which of the following is Virial equation of state?

Accepted Answer

$${	ext{PV}} = {	ext{A}} + \frac{{	ext{B}}}{{	ext{V}}} + \frac{{	ext{C}}}{{{{	ext{V}}^2}}} + \frac{{	ext{D}}}{{{{	ext{V}}^3}}} + \,...$$

Answer

$$\left( {{	ext{p}} + \frac{{	ext{a}}}{{{{	ext{V}}^2}}}} ight)\left( {{	ext{V}} - {	ext{b}}} ight) = {	ext{nRT}}$$

Answer

PV = nRT

Answer

None of the above

Question 8

Which law of the thermodynamics provids basis for measuring the thermodynamic property?

Accepted Answer

Zeroth law

Answer

First law

Answer

Third law

Answer

Second law

Question 9

The value of Cp & Cv respectively for monoatomic gases in Kcal/kg Mole . °K are

Accepted Answer

5 & 3

Answer

3.987 & 1.987

Answer

1.987 & 0.66

Answer

0.66 & 1.987