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Posted: Sun Jan 24, 2016 11:10 pm
by haleygamboa2E
Why is the answer for part (a) negative? (Besides that the heat of fusion is negative)

Re: 9.15

Posted: Sun Jan 24, 2016 11:29 pm
by LinaLi2E
Entropy is the measure of disorder. So "Low entropy means little disorder; high entropy means great disorder" (page 319 of the textbook). In part (a), you are asked to calculate the entropy change for freezing. When you freeze something, you are going from great disorder to little disorder thus you are going from high entropy to low entropy, resulting in the change of entropy to be negative.