Predict whether the following reactions will be exothermic or endothermic. A. N2(g)+3H2(g)⟶2NH3(g)N2⁡(g)+3⁢H2⁡(g)⟶2⁢NH3⁢(g) B. S(g)+O2(g)⟶SO2(g)S(g)+O2⁡(g)⟶SO2⁢(g) C. 2H2O(g)⟶2H2(g)+O2(g)2⁢H2O(g)⟶2⁢H2⁡(g)+O2⁡(g) D. 2F(g)⟶F2(g)2F(g)⟶F2⁡(g) Bond ??Δ⁢H (kJ/mol) H−HH−H 432 N≡NN≡N 942 O=OO=O 494 F−FF−F 155 H−NH−N 386 H−OH−O 459 S=OS=O 522 S−OS−O 355

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Predict whether the following reactions will be exothermic or endothermic.

A. N2(g)+3H2(g)⟶2NH3(g)N2⁡(g)+3⁢H2⁡(g)⟶2⁢NH3⁢(g) B. S(g)+O2(g)⟶SO2(g)S(g)+O2⁡(g)⟶SO2⁢(g)
C. 2H2O(g)⟶2H2(g)+O2(g)2⁢H2O(g)⟶2⁢H2⁡(g)+O2⁡(g) D. 2F(g)⟶F2(g)2F(g)⟶F2⁡(g)
Bond ??Δ⁢H (kJ/mol)
H−HH−H 432
N≡NN≡N 942
O=OO=O 494
F−FF−F 155
H−NH−N 386
H−OH−O 459
S=OS=O 522
S−OS−O 355
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