Question:-
The head added to a closed system during a reversible process is given by Q = aT2 + bT2, where a and b are constant. The entropy change of .the system as its temperature changes from T1 to T2 is equal to
Option (A)
a + b(T2-T1)
Option (B)
[a(T2-T1)+b/2(T22-T21]/T1
Option(C)
[a/2(T2/T1) + 2a(T2-T1)]
Option(D)
a in (T2/T1) + 2b(T2-T1)
Correct Option:
(D)
Question Solution:
Q = aT + bT2
(dQ/dT) = a + 2bT
dq = (a + 2bT.)dT.
Δs = T2T1 (dQ/T) = ∫{( a+2bT)/T} dT
= a in (T2/T1) + 2b(T2-T1)
question-answer-faq-6122