# Problem: What would be the signs of ∆H and ∆S for the reaction AB4(g) → AB3(g) + B(g) ? 1. Both zero. 2. ∆H = +, ∆S = − 3. Impossible to tell from the information given. 4. Both positive.  5. ∆H = −, ∆S = 0 6. ∆H = 0, ∆S = − 7. ∆H = −, ∆S = + 8. Both negative. 9. ∆H = +, ∆S = 0 10. ∆H = 0, ∆S = +

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What would be the signs of ∆H and ∆S for the reaction

AB4(g) → AB3(g) + B(g) ?

1. Both zero.

2. ∆H = +, ∆S = −

3. Impossible to tell from the information given.

4. Both positive.

5. ∆H = −, ∆S = 0

6. ∆H = 0, ∆S = −

7. ∆H = −, ∆S = +

8. Both negative.

9. ∆H = +, ∆S = 0

10. ∆H = 0, ∆S = +

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Our tutors have indicated that to solve this problem you will need to apply the Spontaneous Reaction concept. You can view video lessons to learn Spontaneous Reaction. Or if you need more Spontaneous Reaction practice, you can also practice Spontaneous Reaction practice problems.

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Based on our data, we think this problem is relevant for Professor Gillespie's class at FIU.