Chemistry

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!

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  1. See this link. It answers each.
    http://en.wikipedia.org/wiki/Spontaneous_process

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  2. 1)c
    2)d
    3)b
    4)a

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  3. 1 c
    2 a
    3 d
    4 b

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  4. Paige is correct

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  5. Thanks page

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  6. Thanks Paige.

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  7. Thanks Paige! :D

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  8. Both are wrong. The wiki-link is correct.
    1)b
    2)d
    3)a
    4)3

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  9. Maria is right

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  10. u dum maria

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  11. 我叼你妈的,一个个都是谜语人?

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  12. i agree with 你爸爸

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