Thermodynamic and Statistical Physics (CSIR Physical Sciences): Questions 27 - 29 of 56

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Question number: 27

» Thermodynamic and Statistical Physics » Phase Space

Appeared in Year: 2011

MCQ▾

Question

Consider the transition of liquid water to steam as water boils at a temperature of 1000 C under a pressure of 1 atmosphere. Which one of the following quantities does not change discontinuously at the transition? - (June)

Choices

Choice (4) Response

a.

The internal energy

b.

The entropy

c.

The specific volume

d.

The Gibbs free energy

Question number: 28

» Thermodynamic and Statistical Physics » Maxwell Relations

Appeared in Year: 2011

MCQ▾

Question

A system of N non – interacting spin Equation particles is placed in external magnetic field H. The behaviour of the entropy of the system as a function of energy is given by – (December)

Choices

Choice (4) Response

a.

Entropy as a function of Energy: Choice A

Entropy as a Function of Energy: Choice A

In figure the behaviour of the entropy of the system as function of energy is given.

b.

Entropy as a function of Energy: Choice B

Entropy as a Function of Energy: Choice B

In figure the behaviour of the entropy of the system as function of energy is given.

c.

Entropy as a function of Energy: Choice C

Entropy as a Function of Energy: Choice C

In figure the behaviour of the entropy of the system as function of energy is given.

d.

 Entropy as a function of Energy: Choice D

Entropy as a Function of Energy: Choice D

In figure the behaviour of the entropy of the system as function of energy is given.

Question number: 29

» Thermodynamic and Statistical Physics » Blackbody Radiation

Appeared in Year: 2011

MCQ▾

Question

A cavity contains blackbody radiation in equilibrium at temperature T. The specific heat per unit volume of the photon gas in the cavity is of the form Equation , where Equation is a constant. The cavity is expanded to twice its original volume and then allowed to equilibrate at the same temperature T. The new internal energy per unit volume is – (June)

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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