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As a rubber band is stretched, it gets w...

As a rubber band is stretched, it gets warmer, when released, it gets cooler. The correct sign of thermodynamic parameters for stretching of rubber band is

A

`Delta H = -ve`

B

`Delta H = +ve`

C

`Delta S = -ve`

D

`Delta S = +ve`

Text Solution

Verified by Experts

The correct Answer is:
A, C
As rubber band is stretched, the polymeric molecules come close together and hence heat is released. Close packing in streched rubber decreases the entropy against the loosely held polymeric molecules in normal relaxed rubber.
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