When most elastomeric polymers (e.g., a rubber band)are stretched, the molecules become more ordered, asillustrated here: Suppose you stretch a rubber band. (a) Do you expect theentropy of the system to increase or decrease? (b) If therubber band were stretched isothermally, would heat needto be absorbed or emitted to maintain constant temperature?(c) Try this experiment: Stretch a rubber band andwait a moment. Then place the stretched rubber band onyour upper lip, and let it return suddenly to its unstretchedstate (remember to keep holding on!). What do you observe?Are your observations consistent with your answerto part (b)?
When most elastomeric polymers (e.g., a rubber band)are stretched, the molecules become more ordered, asillustrated here: Suppose you stretch a rubber band. (a) Do you expect theentropy of the system to increase or decrease? (b) If therubber band were stretched isothermally, would heat needto be absorbed or emitted to maintain constant temperature?(c) Try this experiment: Stretch a rubber band andwait a moment. Then place the stretched rubber band onyour upper lip, and let it return suddenly to its unstretchedstate (remember to keep holding on!). What do you observe?Are your observations consistent with your answerto part (b)?
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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When most elastomeric
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 were stretched isothermally, would heat need
to be absorbed or emitted to maintain 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)?
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