Thermodynamic and Statistical Physics [CSIR (Council of Scientific & Industrial Research) Physical Sciences]: Questions 12 - 16 of 89

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Question 12

Appeared in Year: 2013

Question MCQ▾

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.

Helmholtz free energy

c.

Entropy

d.

Gibbs free energy

Edit

Question 13

Appeared in Year: 2012

Question MCQ▾

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

Choices

Choice (4)Response

a.

b.

c.

N

d.

Edit

Question 14

Appeared in Year: 2014

Question MCQ▾

The free energy F of a system depends on a thermodynamic variable as with . The value of , when the system is in thermodynamic equilibrium, is – (June)

Choices

Choice (4)Response

a.

b.

Zero

c.

d.

Edit

Question 15

Appeared in Year: 2014

Question MCQ▾

A system can have three energy levels: . The level is doubly degenerate, while the others are non-degenerate. The average energy at inverse temperature is – (June)

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 16

Appeared in Year: 2013

Question MCQ▾

Two different thermodynamic system are described by the following equations of state –

Where and are respectively the temperatures, the mole numbers and the internal energies of the two systems, and R is the gas constant. Let denote the total energy when these two systems are put in contact and attain thermal equilibrium. The ratio is – (December)

Choices

Choice (4)Response

a.

b.

c.

d.

Edit