Chemical Engineering Thermodynamics MCQs

Question 1

The thermodynamic law, PVY = constant, is not applicable in case of

Accepted Answer

Free expansion of an ideal gas

Answer

Ideal compression of air

Answer

Adiabatic expansion of steam in a turbine

Answer

Adiabatic compression of a perfect gas

Question 2

Entropy change of the reaction, H2O(liquid) ⇒ H2O(gas), is termed as the enthalpy of

Accepted Answer

Vaporisation

Answer

Solution

Answer

Formation

Answer

None of the above

Question 3

Specific __________ does not change during a phase change (e.g. sublimation, melting, vaporisation etc.).

Accepted Answer

Gibbs free energy

Answer

Entropy

Answer

Internal energy

Answer

Enthalpy

Question 4

For an ideal gas, the activity co-efficient is

Accepted Answer

Unity at all pressures

Answer

Directly proportional to pressure

Answer

Inversely proportional to pressure

Answer

None of these

Question 5

For an isothermal process, the internal energy of a gas

Accepted Answer

Remains unchanged

Answer

Increases

Answer

Decreases

Answer

Data insufficient, can't be predicted

Question 6

If two gases have same reduced temperature and reduced pressure, then they will have the same

Accepted Answer

None of these

Answer

Volume

Answer

Mass

Answer

Critical temperature

Question 7

Gibbs phase rule finds application, when heat transfer occurs by

Accepted Answer

Condensation

Answer

Conduction

Answer

Convection

Answer

Radiation

Question 8

There is a change in __________ during the phase transition.

Accepted Answer

Volume

Answer

Pressure

Answer

Temperature

Answer

All of the above

Question 9

At a given temperature, the volume of a gas dissolved in a solvent __________ with increase in pressure.

Accepted Answer

Remains unchanged

Answer

Increases

Answer

Decreases

Answer

May increase or decrease; depends on the gas