Physical Chemistry Quiz on Thermodynamics -II( BSc 3rd semester)

The efficiency of a heat engine is always

• (a) 0

• (b) 1

• (c) less than 1

• (d) greater than 1

The measure of disorder or randomness is termed as

• (a) entropy

• (b) work

• (c) heat

• (d) enthalpy

In a cyclic process

• (a) Work done is zero

• (b) Work done by the system is equal to the quantity of heat absorbed by the system

• (c) The internal energy of the system decreases

• (d) Work done does not depend on the quantity of heat absorbed by the system

Which is the incorrect statement about entropy

• (a) It is a state function

• (b) It is a path function

• (c) It is an extensive property

• (d) It is always a positive quantity for spontaneous process

Tick the correct statement.

• (a) -∆G is a measure of maximum work obtainable in process

• (b) -∆G is a measure of useful work other than PV work obtainable in a process.

• (c) ∆G is a measure of ∆PV in a process

• (d) ∆G is a measure of usefull work in a process.

Select the incorrect relation.

• (a) G= H - TS

• (b) G = A - PV

• (c) A = U- TS

• (d) -A = -G + PV

Tick the correct relation.

• (a) dG= VdP + SdT

• (b) dG= PdV -SdT

• (c) dG= VdP -SdT

• (d) dA= PdV + SdT

Tick the incorrect relation.

• (a) ∆G= nRT ln P2/P1

• (b) ∆G= nRT ln V1/V2

• (c) ∆A = - nRT ln V1/V2

• (d) ∆A = nRT ln P2/P1

For spontaneity of a process the most preferred criterion is

• (a) (dS)U,V

• (b) (dU)S,V

• (c) (dG)T,P

• (d) (dH)S,P

A spontaneous process

• (a) is reversible

• (b) is irreversible

• (c) reversible or irreversible depending on whether equilibrium is maintained throughout the process

• (d) reversible or irreversible depending on the value of ∆S