Chemical Engineering Thermodynamics MCQs

Question 1

If the molar heat capacities (Cp or Cv) of the reactants and products of a chemical reaction are identical, then, with the increase in temperature, the heat of reaction will

Accepted Answer

Remain unaltered

Answer

Increase

Answer

Decrease

Answer

Increase or decrease ; depends on the particular reaction

Question 2

If the vapour pressure at two temperatures of a solid phase in equilibrium with its liquid phase are known, then the latent heat of fusion can be calculated by the

Accepted Answer

Clayperon-Claussius equation

Answer

Maxwell's equation

Answer

Van Laar equation

Answer

Nernst Heat Theorem

Question 3

If the heat of solution of an ideal gas in a liquid is negative, then its solubility at a given partial pressure varies with the temperature as

Accepted Answer

Solubility increases as temperature decreases

Answer

Solubility increases as temperature increases

Answer

Solubility is independent of temperature

Answer

Solubility increases or decreases with temperature depending on the Gibbs free energy change of solution

Question 4

Pick out the wrong statement.

Accepted Answer

An equation relating pressure, volume and temperature of a gas is called ideal gas equation

Answer

Trouton's ratio of non-polar liquids is calculated using Kistyakowasky equation

Answer

Thermal efficiency of a Carnot engine is always less than 1

Answer

None of these

Question 5

For the gaseous phase chemical reaction, C2H4(g) + H2O(g) ⟷ C2H5OH(g), the equilibrium conversion does not depend on the

Accepted Answer

None of these

Answer

Steam to ethylene ratio

Answer

Temperature

Answer

Pressure

Question 6

For an irreversible process involving only pressure-volume work

Accepted Answer

(dF)T, P < 0

Answer

(dF)T, P = 0

Answer

(dF)T, P > 0

Answer

(dA)T, V > 0

Question 7

For a reversible process involving only pressure-volume work

Accepted Answer

(dF)T, P = 0

Answer

(dF)T, P < 0

Answer

(dF)T, P > 0

Answer

(dA)T, V < 0

Question 8

In an ideal solution, the activity of a component equals its

Accepted Answer

Mole fraction

Answer

Fugacity at the same temperature and pressure

Answer

Partial pressure

Answer

None of these

Question 9

Water on heating from 1 to 4°C

Accepted Answer

Contracts

Answer

Expands

Answer

Has same volume

Answer

May contract or expand