EML3100 HW #21 - Fall 1998

Due: Thursday 11/5/98

Problems:
6.9c,d
6.13d,e

Word Problem
(a) Find the change in specific entropy (in kJ/kgK) when an aluminum pie pan is heated from room temperature (68 degrees F) to 450 degrees F.
(b) Find the change in specific entropy (in kJ/kgK) for a copper pot experiencing the same temperature change.

Answers:
No answers will be given

Hints:
6.9d:remember that s-bar = S/n = S/(# moles)
and s = s-bar/M = s-bar/(molecular mass)
6.13:Choose a specific heat value that is at the average of T2 and T1.
Select your delta-s equation based on the given information.
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