CHEMICAL ENGINEERING THERMODYNAMICS QUIZ

The Maxwell relation derived from the differential expression for the Helmholtz free energy (dA) is

(∂S/∂P)T = -(∂V/∂T)P

(∂T/∂V)S = -(∂P/∂S)V

(∂S/∂V)T = (∂P/∂T)V

(∂V/∂S)P = (∂T/∂P)S

TRUE ANSWER : ?
YOUR ANSWER : ?

With increase in compression ratio, the efficiency of the otto engine

Increases

Decreases

Remains constant

Increases linearly

TRUE ANSWER : ?
YOUR ANSWER : ?

The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called the __________ temperature.

Reduced

Boyle

Critical

Inversion

TRUE ANSWER : ?
YOUR ANSWER : ?

Consider the reaction, C + O₂ ⇋ CO₂ ;ΔH = - 94 kcal. What will be the value of ΔH for the reaction CO₂ → C + O₂?

< -94 kcal

-94 kcal

> 94 kcal

+ 94 kcal

TRUE ANSWER : ?
YOUR ANSWER : ?

A gas mixture of three components is brought in contact with a dispersion of an organic phase in water. The degree of freedom of the system are

6

5

4

3

TRUE ANSWER : ?
YOUR ANSWER : ?

The work done in isothermal compression compared to that in adiabatic compression will be

More

More or less depending upon the extent of work done

Same

Less

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not an extensive property?

Refractive index

None of these

Entropy

Free energy

TRUE ANSWER : ?
YOUR ANSWER : ?

The number of degrees of freedom for an azeotropic mixture in a two component vapour-liquid equilibria is/are

Two

One

Zero

Three

TRUE ANSWER : ?
YOUR ANSWER : ?

Near their critical temperatures, all gases occupy volumes __________ that of the ideal gas.

Half

Less than

Same as

More than

TRUE ANSWER : ?
YOUR ANSWER : ?

Molar heat capacity of water in equilibrium with ice at constant pressure is __________ Kcal/kg mole . °K

50

100

∞

TRUE ANSWER : ?
YOUR ANSWER : ?

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