CHEMICAL ENGINEERING THERMODYNAMICS QUIZ

Which is not constant for an ideal gas?

(∂P/∂V)V

(∂P/∂V)T

(∂V/∂T)P

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The gas law (PV = RT) is true for an __________ change.

Both A & B

Adiabatic

Isothermal

Neither A nor B

TRUE ANSWER : ?
YOUR ANSWER : ?

(∂E/∂T)V is the mathematical expression for

None of these

Free energy change

Enthalpy change

CV

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following units is not present in both the vapor compression refrigeration system and absorption refrigeration system ?

Compressor

Refrigerator

Expansion valve

Condenser

TRUE ANSWER : ?
YOUR ANSWER : ?

What is the number of degrees of freedom for liquid water in equilibrium with a mixture of nitrogen and water vapor?

1

0

3

2

TRUE ANSWER : ?
YOUR ANSWER : ?

Fugacity and pressure are numerically equal, when the gas is

In ideal state

In standard state

At high pressure

At low temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

For a given substance at a specified temperature, activity is __________ to fugacity.

None of these

Directly proportional

Inversely proportional

Equal

TRUE ANSWER : ?
YOUR ANSWER : ?

In jet refrigerators, the refrigerating fluid is practically always

Ammonia

Water

Freon

Brine

TRUE ANSWER : ?
YOUR ANSWER : ?

Entropy of the system decreases, when

Both B & C

Snow melts into water

Water is converted into ice

A gas expands spontaneously from high pressure to low pressure

TRUE ANSWER : ?
YOUR ANSWER : ?

The value of Cp & Cv respectively for monoatomic gases in Kcal/kg Mole . °K are

3.987 & 1.987

0.66 & 1.987

1.987 & 0.66

5 & 3

TRUE ANSWER : ?
YOUR ANSWER : ?

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