Chemical Engineering Thermodynamics MCQs

Question 1

$${\left( {\frac{{\partial {	ext{E}}}}{{\partial {	ext{T}}}}} ight)_{	ext{V}}}$$ is the mathematical expression for

Accepted Answer

None of these

Answer

CV

Answer

Enthalpy change

Answer

Free energy change

Question 2

$${\left( {\frac{{\partial {	ext{H}}}}{{\partial {	ext{T}}}}} ight)_{	ext{P}}}$$ is the mathematical expression for

Accepted Answer

None of these

Answer

CV

Answer

Entropy change

Answer

Gibbs free energy

Question 3

$${\left( {\frac{{\partial {	ext{T}}}}{{\partial {	ext{P}}}}} ight)_{	ext{H}}}$$ is the mathematical expression for

Accepted Answer

Joule-Thompson co-efficient

Answer

Specific heat at constant pressure (Cp)

Answer

Specific heat at constant volume (Cv)

Answer

None of these

Question 4

A refrigeration cycle is the same as a __________ cycle,

Accepted Answer

Reversed heat engine

Answer

Turbine

Answer

Heat engine

Answer

None of these

Question 5

Heat of reaction is

Accepted Answer

Dependent on both pressure and temperature

Answer

Dependent on pressure only

Answer

Dependent on temperature only

Answer

Independent of temperature changes

Question 6

Pick out the correct statement.

Accepted Answer

In a closed system, the energy can be exchanged with the surrounding, while. matter can not be exchanged

Answer

Entropy and enthalpy are path functions

Answer

All the natural processes are reversible in nature

Answer

Work is a state function

Question 7

Pick out the wrong statement.

Accepted Answer

Thermal efficiency of a Carnot engine depends upon the properties of the working fluid besides the source & sink temperatures

Answer

The values of $${\left( {\frac{{\partial {	ext{P}}}}{{\partial {	ext{V}}}}} ight)_{	ext{T}}}$$ and $${\left( {\frac{{{\partial ^2}{	ext{P}}}}{{\partial {{	ext{V}}^2}}}} ight)_{	ext{T}}}$$ are zero for a real gas at its critical point

Answer

Heat transferred is equal to the change in the enthalpy of the system, for a constant pressure, non-flow, mechanically reversible process

Answer

During a reversible adiabatic process, the entropy of a substance remains constant

Question 8

Heat pump

Accepted Answer

Accomplishes both A and B

Answer

Accomplishes only space heating in winter

Answer

Accomplishes only space cooling in summer

Answer

Works on Carnot cycle

Question 9

A cylinder contains 640 gm of liquid oxygen. The volume occupied (in litres) by the oxygen, when it is released and brought to standard conditions (0°C, 760 mm Hg) will be __________ litres.

Accepted Answer

448

Answer

224

Answer

22.4

Answer

Data insufficient; can't be computed