Consider a systen of N non-interacting particles for which the energy of each pa

Question

Consider a systen of N non-interacting particles for which the energy of each particle can assume two and only two distinct values: 0 and E (E>0). denote N1 and N2 to be the occulation numbers of the levels 0 and E respectively. The fixed ttoal energy of the system is U.

a) Find the entropy of the system.

b) Find the temperature as a function of U. For what range of values is N1 is T<0?

c) In which direction does heat flow when a system of negative temerature is brought into thermal contact with a system of positive temperature? Why?

Explanation / Answer

entropy = N1 +N2 +N3 ..+Nn

...

temperature =entropy/E

...........

when system of negative temperature is brought in contact with positive temperature heat flows from positive to negative temperature . as heat always flow from high to low temperature

negative temperature only implies that it is below some fixed temperature

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.