CHEMICAL ENGINEERING THERMODYNAMICS QUIZ

With increase in temperature, the atomic heat capacities of all solid elements

Decreases

Increases

Decreases linearly

Remains unchanged

TRUE ANSWER : ?
YOUR ANSWER : ?

Gibbs free energy of a pure fluid approaches __________ as the pressure tends to zero at constant temperature.

Infinity

None of these

Minus infinity

Zero

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ decreases during adiabatic throttling of a perfect gas.

Enthalpy

Temperature

Pressure

Entropy

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following will increase the volume of a real gas by four times ?

Reducing temperature to one fourth at constant pressure

Reducing the temperature to half and doubling the pressure

Reducing pressure to one fourth at constant temperature

Doubling the absolute temperature as well as pressure of the gas

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Increases

Remains constant

Increases linearly

Decreases

TRUE ANSWER : ?
YOUR ANSWER : ?

Work done in case of free expansion is

Negative

None of these

Zero

Indeterminate

TRUE ANSWER : ?
YOUR ANSWER : ?

The reaction A (l) R(g) is allowed to reach equilibrium conditions in an autoclave. At equilibrium, there are two phases, one a pure liquid phase of A and the other a vapor phase of A, R and S. Initially A alone is present. The number of degrees of freedom are

3

1

2

TRUE ANSWER : ?
YOUR ANSWER : ?

Boyle's law for gases states that

P ∝ V, at constant temperature & mass of the gas

P/V = constant, for any gas

P ∝ 1/V, when temperature & mass of the gas remain constant

P ∝ 1/V, when temperature is constant

TRUE ANSWER : ?
YOUR ANSWER : ?

In Joule-Thomson porous plug experiment, the

Temperature remains constant

None of these

Enthalpy does not remain constant

Entire apparatus is exposed to surroundings

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ increases with increase in pressure.

The melting point of wax

Neither A nor B

The boiling point of a liquid

Both A and B

TRUE ANSWER : ?
YOUR ANSWER : ?