Prompt

When most elastomeric polymers $($e$.$g$.,$ a rubber band$)$ are stretched, the molecules become more ordered, as illustrated here:

Suppose you stretch a rubber band. $($a$)$ Do you expect the entropy of the system to increase or decrease? $($b$)$ If the rubber band was stretched isothermally, would heat need to be absorbed or emitted to maintain a constant temperature? $($c$)$ Try this experiment: Stretch a rubber band and wait a moment. Then place the stretched rubber band on your upper lip, and let it return suddenly to its unstretched state $($remember to keep holding on$!).$ What do you observe? Are your observations consistent with your answer to part $($b$)?$ Explain.