ch8q6

2B(s) + 3/2O₂(g) B₂O₃(s); H^o_f = -1271.4 kJ

B₂H₆(g) + 3O₂(g) B₂O₃(s) + 3H₂O(g); H^o_r = -2032.5 kJ

H₂(g) + 1/2 O₂(g) H₂O(); H^o_f = -283.3 kJ

H₂O() H₂O(g); H_vap = 40.4 kJ

Choose your answer in scientific notation, e.g., ±1.000x10^±00
+ - 1 2 3 4 5 6 7 8 9 . 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 x 10^{ + - 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 ^}

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