Consider the combustion of pentaborane-9 (B5H9 ):   2 B5H9 (l) + 12 O2 (g) → 5 B2O3 (s) + 9 H2O (l)   Calculate the heat of reaction (in kJ) when 8.65 g B5H9 is combusted. Substance ΔH f   (kJ/mol) B5H 9 (l) +73 B2O 3 (s) -1273 H2O (l) -286

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Consider the combustion of pentaborane-9 (B5H9 ):
 
2 B5H9 (l) + 12 O2 (g) → 5 B2O3 (s) + 9 H2(l)
 
Calculate the heat of reaction (in kJ) when 8.65 g B5H9 is combusted.

Substance
ΔH f   (kJ/mol)
B59 (l)
+73
B23 (s)
-1273
H2(l)
-286
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