Pentaborane B₅H₉(s)burns Vigorously in O₂ to Give B₂O₃(s)and H₂O(l) $\Delta$ H_rxn for the Combustion of 5

question 116

Multiple Choice

Pentaborane B₅H₉(s) burns vigorously in O₂ to give B₂O₃(s) and H₂O(l) .Calculate $\Delta$ H_rxn for the combustion of 5.00 mol of B₅H₉.
$\Delta$ H°_f[B₂O₃(s) ] = -1,273.5 kJ/mol
$\Delta$ H°_f[B₅H₉(s) ] = 73.2 kJ/mol
$\Delta$ H°_f[H₂O(l) ] = -285.8 kJ/mol

• A)- 45,400 kJ
• B)45,400 kJ
• C)- 22,700 kJ
• D)- 9,090 kJ
• E)- 8,790 kJ

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