CHEMICAL ENGINEERING THERMODYNAMICS QUIZ

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 : ?

Entropy of an ideal gas depends upon its

Pressure

Both A & B

Neither A nor B

Temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

Kopp's rule is used to calculate the heat capacity of

All of these

Solids

Gases

Liquids

TRUE ANSWER : ?
YOUR ANSWER : ?

Critical temperature is defined as the temperature above which a gas will

Never liquify however high the pressure may be

Immediately liquify

None of these

Not liquify (barring exceptions)

TRUE ANSWER : ?
YOUR ANSWER : ?

In case of steady flow compression polytropic process (PVn = constant), the work done on air is the lowest, when

N = 1.66

N = 0

N = y = 1.4

N = 1

TRUE ANSWER : ?
YOUR ANSWER : ?

Claude's liquefaction process employs the cooling of gases by

None of these

Throttling

Following a constant pressure cycle

Expansion in an engine

TRUE ANSWER : ?
YOUR ANSWER : ?

The molar excess Gibbs free energy, gE, for a binary liquid mixture at T and P is given by, (gE/RT) = A . x₁. x₂, where A is a constant. The corresponding equation for ln y₁, where y₁ is the activity co-efficient of component 1, is

Ax₂

Ax₁²

A . x₂²

Ax₁

TRUE ANSWER : ?
YOUR ANSWER : ?

Internal energy of an ideal gas

None of these

Decreases with increase in temperature

Increases with increase in pressure

Is independent of temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

With increase in pressure (above atmospheric pressure), the Cp of a gas

Decreases

Increases

First decreases and then increases

Remains unchanged

TRUE ANSWER : ?
YOUR ANSWER : ?

The extensive properties are

Free energy, entropy and enthalpy

Both A and B

None of these

Volume, mass and number of moles

TRUE ANSWER : ?
YOUR ANSWER : ?

↑