Homework Help: Chemistry

Posted by Jessica on Wednesday, November 9, 2011 at 3:15am.

Classify the possible combinations of signs for a reaction's ∆H and ∆S values by the resulting spontaneity.

A) Spontaneous as written at all temperatures.
B) Spontaneous in reverse at all temperatures.
C) Spontaneous as written above a certain temperature.
D) Spontaneous as written, below a certain temperature.

1) ∆H = + // ∆S = +
2) ∆H = - // ∆S = +
3) ∆H = - // ∆S = -
4) ∆H = + // ∆S = -

I'm beyond confused. Please help!

Chemistry - DrBob222, Wednesday, November 9, 2011 at 1:53pm
See this link. It answers each.
http://en.wikipedia.org/wiki/Spontaneous_process

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