4

# The standard Gibbs free energy change of a reaction depends on the equilibrium

Pressure

Temperature

Composition

All (A), (B) and (C)

B. Temperature

4

Rectangle

Rhombus

Trapezoid

Circle

4

# Pick out the correct statement:

In an isothermal system, irreversible work is more than reversible work

Under reversible conditions, the adiabatic work is less than isothermal work

Heat, work, enthalpy and entropy are all 'state functions'

Matter and energy cannot be exchanged with the surroundings in a closed system

4

# For an incompressible fluid, the __________ is a function of both pressure as well as temperature.

Internal energy

Enthalpy

Entropy

All (A), (B) & (C)

4

RT d ln P

R d ln P

R d ln f

None of these

4

# Heat pump

Accomplishes only space heating in winter

Accomplishes only space cooling in summer

Accomplishes both (A) and (B)

Works on Carnot cycle

4

# The standard state of a gas (at a given temperature) is the state in which fugacity is equal to

Unity

Activity

Both (A) & (B)

Neither (A) nor (B)

4

√(2KT/m)

√(3KT/m)

√(6KT/m)

3KT/m

4

Reversible

Isothermal

None of these

4

# PVy = constant, holds good for an isentropic process, which is

Reversible and isothermal

Isothermal and irreversible

4

-19.4

-30.2

55.2

-55.2

4

# The extensive properties are

Volume, mass and number of moles

Free energy, entropy and enthalpy

Both (A) and (B)

None of these

4

Molecular size

Volume

Pressure

Temperature

4

Isothermal

Isometric

None of these

4

Zero

Unity

Infinity

Negative

4

# In a homogeneous solution, the activity coefficient of a component depends upon the

Pressure

Composition

Temperature

All (A), (B) and (C)

4

# Which is an example of closed system?

Air compressor

Liquid cooling system of an automobile

Boiler

None of these

4

Indeterminate

Zero

Negative

None of these

4

# For a spontaneous process, free energy

Is zero

Increases

Decreases whereas the entropy increases

And entropy both decrease

4

λb/Tb

Tb/λb

√(λb/Tb)

√(Tb/λb)

4

# The chemical potential of a component (μi) of a phase is the amount by which its capacity for doing all work, barring work of expansion is increased per unit amount of substance added for an infinitesimal addition at constant temperature and pressure. It is given by

(∂E/∂ni)S, v, nj

(∂G/∂ni)T, P, nj = (∂A/∂ni) T, v, nj

(∂H/∂ni)S, P, nj

All (A), (B) and (C)

4

Isothermal

Isentropic

Isobaric

4

0

1

2

3

4

Minimum

Zero

Maximum

Indeterminate

4

# Which of the following is affected by the temperature?

Fugacity

Activity co-efficient

Free energy

All (A), (B) & (C)

4

# The heat capacities for the ideal gas state depend upon the

Pressure

Temperature

Both (A) & (B)

Neither (A) nor (B)

4

# Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ____with the increase of reduced temperature.

Decreases

Increases

Remains constant

Decreases logarithmically

4

Zeroth

First

Second

Third

4

# As the entropy of the universe is increasing, day by day, the work producing capacity of a heat engine is

Not changed

Decreasing

Increasing

Data sufficient, can't be predicted

4

1

< 1

> 1

>> 1