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December 19, 2014

Homework Help: Chemistry(Please check answers)

Posted by Hannah on Monday, April 23, 2012 at 1:29pm.

1) For a reaction delta Go is more negative than delta Ho. What does this mean?

a. delta So is zero.
b. delta So is negative
c. delta So is positive
d. delta So is negative if delta Ho is positive.
e. delta So is negative if delta Ho is negative.

I think that delta S is negative if delta H is positive.

2) Sodium reacts violently with water according to the equation:

2 Na (s) + 2 H2O (l) -> 2 NaOH (aq) + H2 (g)

The resulting solution has a higher temperature than the water prior to the addition of the sodium. What are the signs of delta Ho and delta So for this reaction?

a. delta Ho is negative and delta So is positive.
b. delta Ho is positive and delta So is negative.
c. delta Ho and delta So are both negative.
d. delta Ho and delta So are both positive.

I think that the water is endothermic which would make the system exothermic which means that delta H and delta S would be negative.

Would you agree with my answers? Thank you.

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