Look up delta H formation and plug into
dHrxn = (n*dHf products) - (n*dHf reactants). If the sign is - it is exothermic; endothermis is + sign.
Predict whether each of the following reactions would be exothermic or endothermic.
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
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