Question
The fundamental thermodynamic relation for a rubber band is given by π πΌ = π»π πΊ + ππ π³, where π» is the absolute temperature, πΊ is the entropy, π is the tension in the rubber band, and π³ is the length of the rubber band. Which one of the following relations is CORRECT:
Options :
Answer :
Solution :
If there is a relation between x, y & z, then z may be expressed as a function of x & y.
If an equation of type dZ = Mdx + Ndy is an exact differential, then it can be written as
Now,
Comparing this thermodynamic relation dU = TdS + ΟdL with we get,
Z = U, M = T, X = S, N = Ο, y = L
The thermodynamic relation can be written as,
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