Chemical Engineering Thermodynamics MCQs

Question 1

Which of the following identities can be most easily used to verify steam table data for superheated steam.

Accepted Answer

$${\left( {\frac{{\partial {	ext{V}}}}{{\partial {	ext{T}}}}} ight)_{	ext{P}}} = - {\left( {\frac{{\partial {	ext{S}}}}{{\partial {	ext{P}}}}} ight)_{	ext{T}}}$$

Answer

$${\left( {\frac{{\partial {	ext{T}}}}{{\partial {	ext{V}}}}} ight)_{	ext{S}}} = {\left( {\frac{{\partial {	ext{P}}}}{{\partial {	ext{S}}}}} ight)_{	ext{V}}}$$

Answer

$${\left( {\frac{{\partial {	ext{T}}}}{{\partial {	ext{P}}}}} ight)_{	ext{S}}} = {\left( {\frac{{\partial {	ext{V}}}}{{\partial {	ext{S}}}}} ight)_{	ext{P}}}$$

Answer

$${\left( {\frac{{\partial {	ext{P}}}}{{\partial {	ext{T}}}}} ight)_{	ext{V}}} = {\left( {\frac{{\partial {	ext{S}}}}{{\partial {	ext{V}}}}} ight)_{	ext{T}}}$$

Question 2

Filling of gas from a high pressure cylinder into small bottles is an example of a/an __________ process.

Accepted Answer

Unsteady

Answer

Equilibrium

Answer

Adiabatic

Answer

Steady

Question 3

Charles law for gases states that

Accepted Answer

$$\frac{{	ext{V}}}{{	ext{T}}}$$ = Constant

Answer

$${	ext{V}} \propto \frac{1}{{	ext{T}}}$$

Answer

$${	ext{V}} \propto \frac{1}{{	ext{P}}}$$

Answer

$$\frac{{{	ext{PV}}}}{{	ext{T}}}$$ = Constant

Question 4

Boyle's law for gases states that

Accepted Answer

$${	ext{P}} \propto \frac{1}{{	ext{V}}},$$ when temperature & mass of the gas remain constant

Answer

$${	ext{P}} \propto \frac{1}{{	ext{V}}},$$ when temperature is constant

Answer

$$P \propto {	ext{V,}}$$ at constant temperature & mass of the gas

Answer

$$\frac{{	ext{P}}}{{	ext{V}}}$$ = constant, for any gas

Question 5

Which of the following is not an intensive property?

Accepted Answer

Volume

Answer

Density

Answer

Temperature

Answer

Pressure

Question 6

Pick out the wrong statement.

Accepted Answer

Heat and work are both state function

Answer

Phase rule variables are intensive properties

Answer

The work done by expansion of a gas in vacuum is zero

Answer

CP and CV are state function

Question 7

What is the number of degree of freedom for a system of two miscible non-reacting species in vapor-liquid equilibrium forming an azeotrope?

Accepted Answer

1

Answer

3

Answer

2

Answer

0

Question 8

What is the degree of freedom for two mis-cible (non-reacting) substances in vapor-liquid equilibrium forming an azeotrope?

Accepted Answer

2

Answer

0

Answer

1

Answer

3

Question 9

At __________ point, all the three phases (i.e.solid, liquid and gas) co-exist.

Accepted Answer

Triple

Answer

Eutcetic

Answer

Plait

Answer

Critical