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 |
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. |
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. |
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. |
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. |