Introduction to Statistical Physics - Silvio Salinas:(adsbygoogle = window.adsbygoogle || []).push({});

Consider an elastic ribbon of lengthunder a tensionL. In a quasi-static process, we can write:f

dU = TdS + fdL + [tex]\mu[/tex]dN

Suppose that the tension is increased very quickly, fromtof, keeping the temperaturef+dffixed. Obtain an expression for the change of entropy just after reaching equilibrium. What is the change of entropy per mole for an elastic ribbon that behaves according to the equation of stateT, whereL/N = cf/Tis a constant?c

The tension is increased quickly, so is this a quasi-static process?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Change of entropy for an elastic ribbon under a tension

Can you offer guidance or do you also need help?

Draft saved
Draft deleted

**Physics Forums | Science Articles, Homework Help, Discussion**