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Predict whether the following reactions will be exothermic or endothermic

Chemistry

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Predict whether the following reactions will be exothermic or endothermic.

A. N2(g)+3H2(g)----->2NH3

B. S(g)+O2(g) -------->SO2(g)

C. 2H2O(g) -------->2H2(g)+O2(g)

D. 2F(g) ---------> F2(g)