Thermodynamic and Statistical Physics (CSIR Physical Sciences): Questions 11 - 14 of 56

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Question number: 11

» Thermodynamic and Statistical Physics » Micro- and Macro-States

Appeared in Year: 2012

MCQ▾

Question

The entropy of a system, S, is related to the accessible phase space volume Γ by S=kBlnΓ(E,N,V) where E, N and V are the energy, number of particles and volume respectively. From this one can conclude that Γ – (December)

Choices

Choice (4) Response
a.

Oscillates during evolution to equilibrium

b.

Does not change during evolution to equilibrium

c.

Is a maximum at equilibrium

d.

Is a minimum at equilibrium

Question number: 12

» Thermodynamic and Statistical Physics » Free Energy

Appeared in Year: 2013

MCQ▾

Question

Consider the melting transition of ice into water at constant pressure. Which of the following thermodynamic quantities does not exhibit a discontinuous change across the phase transition? (December)

Choices

Choice (4) Response
a.

Internal energy

b.

Entropy

c.

Helmholtz free energy

d.

Gibbs free energy

Question number: 13

» Thermodynamic and Statistical Physics » Micro- and Macro-States

Appeared in Year: 2012

MCQ▾

Question

The number of ways in which N identical bosons can be distributed in two energy levels, is – (June)

Choices

Choice (4) Response
a.

N(N1)2

b.

N(N+1)2

c.

N+1

d.

N

Question number: 14

» Thermodynamic and Statistical Physics » Free Energy

Appeared in Year: 2014

MCQ▾

Question

The free energy F of a system depends on a thermodynamic variable ψ as F=aψ2+bψ6 with a,b>0 . The value of ψ , when the system is in thermodynamic equilibrium, is – (June)

Choices

Choice (4) Response
a.

±(a6b)14

b.

±(a3b)14

c.

±(ab)14

d.

Zero

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