11. Now suppose a chemical process consists of a particle transfering back and f

Question

11. Now suppose a chemical process consists of a particle transfering back and forth between a site A that is non-degenerate and a doubly degenerate site B. The energy difference between the two sites is AE ED EA w 2(In2)kBT, where T is temperature. The probability ps for the particle to be at site B relative to the probability PA i e, pB/pA, is equal to: (a) 1 (b) 1/2 (c) 1/4 (d) 1/8 12. An ideal monatomic gas has been compressed at constant temperature. Its entropy (a) increased (b) decreased (c) remained constant (d) not enough information 13. Two moles worth of an ideal gua at atmospheric pressure has tripled while maintained at constant temperature its volu 300K. It has performed work equal to: (a) 2.7 (c) -27 kJ (d) -5.5 kJ

Explanation / Answer

Q11. Option (A) is corect answer. There is equal probability that electrom may be present in the A or B site.

Q12. Entropy will decrease.

S = S2 - S1 = nRRln(V2/V1)

since V2 is less than V1 the S will be negative or S2 will be less than S1.

Q13. The work done is given as:

w = -nRTlnV2/V1

w = - 2 X 8.314 X300 X ln(3/1)

w = - 2 X 8.314 X 300 X ln(3/1)

w = - 5.5KJ Hence option (d) is the correct answer.

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