Chemical Engineering Thermodynamics

Question: In reactions involving solids and liquids (where change in volume is negligible), the heat of reaction at constant pressure as compared to that at constant volume is
[A].

more

[B].

less

[C].

same

[D].

unpredictable; depends on the particular reaction

Answer: Option C

Explanation:

No answer description available for this question.

Question: 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
[A].

increase

[B].

decrease

[C].

remain unaltered

[D].

increase or decrease ; depends on the particular reaction

Answer: Option C

Explanation:

No answer description available for this question.

Question: In the reaction, C + O2 CO2 ; ΔH = – 94 kcal. What is the heat content (enthalpy)of O2?
[A].

-94 kcal

[B].

> -94 kcal

[C].

< – 94 kcal

[D].

zero

Answer: Option D

Explanation:

No answer description available for this question.

Question: Consider the reaction, C + O2 CO2 ;ΔH = – 94 kcal. What will be the value of ΔH for the reaction CO2 C + O2 ?
[A].

-94 kcal

[B].

+ 94 kcal

[C].

> 94 kcal

[D].

< -94 kcal

Answer: Option B

Explanation:

No answer description available for this question.

Question: Compound having large heat of formation is
[A].

more stable.

[B].

less stable.

[C].

not at all stable (like nascent O2).

[D].

either more or less stable ; depends on the compound.

Answer: Option A

Explanation:

No answer description available for this question.

Question: The amount of heat required to decompose a compound into its elements is __________ the heat of formation of that compound from its elements.
[A].

less than

[B].

more than

[C].

same as

[D].

not related to

Answer: Option C

Explanation:

No answer description available for this question.

Question: ‘The fugacity of a gas in a mixture is equal to the product of its mole fraction and its fugacity in the pure state at the total pressure of the mixture”. This is
[A].

the statement as per Gibbs-Helmholtz

[B].

called Lewis-Randall rule

[C].

Henry’s law

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Fugacity is a measure of the
[A].

escaping tendencies of the same substance in different phases of a system.

[B].

relative volatility of a mixture of two miscible liquids.

[C].

behaviour of ideal gases.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Free energy change of mixing two liquid substances is a function of the
[A].

concentration of the constituents only.

[B].

quantities of the constituents only.

[C].

temperature only.

[D].

all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: Entropy change of mixing two liquid substances depends upon the
[A].

molar concentration

[B].

quantity (i.e. number of moles)

[C].

both (a) and (b)

[D].

neither (a) nor (b)

Answer: Option C

Explanation:

No answer description available for this question.