Chemical Engineering Thermodynamics MCQs

Question 1

Enthalpy 'H' is defined as

Accepted Answer

H - E = PV

Answer

H = E - PV

Answer

H = F - TS

Answer

None of these

Question 2

Entropy is a/an

Accepted Answer

None of these

Answer

State function

Answer

Macroscopic property

Answer

Extensive property

Question 3

Pick out the correct equation relating 'F' and 'A'.

Accepted Answer

F = A + PV

Answer

F = E + A

Answer

F = A - TS

Answer

F = A + TS

Question 4

Mollier chart is a __________ plot.

Accepted Answer

Enthalpy vs entropy

Answer

Pressure vs enthalpy

Answer

Pressure vs volume

Answer

Temperature vs entropy

Question 5

After throttling, gas temperature

Accepted Answer

Decreases

Answer

Increases

Answer

Remains same

Answer

May increase or decrease ; depends on the nature of the gas

Question 6

Critical temperature is defined as the temperature above which a gas will

Accepted Answer

Never liquify however high the pressure may be

Answer

Not liquify (barring exceptions)

Answer

Immediately liquify

Answer

None of these

Question 7

Equation which relates pressure, volume and temperature of a gas is called the

Accepted Answer

Equation of state

Answer

Gibbs Duhem equation

Answer

Ideal gas equation

Answer

None of these

Question 8

A chemical reaction will occur spontaneously at constant pressure and temperature, if the free energy is

Accepted Answer

Negative

Answer

Zero

Answer

Positive

Answer

None of these

Question 9

The free energy change for a chemical reaction is given by (where, K = equilibrium constant)

Accepted Answer

-RT lnK

Answer

RT lnK

Answer

-R lnK

Answer

T lnK