Predict whether each of the following reactions would be exothermic or endothermic.

Question

a. CO(g) --> C(g) + O(g)
b. 2H(g) + O(g) --> H20(g)
c. Na+(g) + Cl-(g) --> NaCl(s)

What is the sign of DH in each of these reactions?

Please explain. I am very confused. Thanks

Answer 1

I don't know how this got copied three times. Sorry