Pentaborane B 5 H 9 (s) Burns Vigorously in O 2 to Give B 2 O 3 (s) and H 2 O(l)

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Pentaborane B 5 H 9 (s) Burns Vigorously in O 2 to Give B 2 O 3 (s) and H 2 O(l)

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Pentaborane B₅H₉(s) Burns Vigorously in O₂ to Give B₂O₃(s) and H₂O(l)

Question 36

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^$\circ$_f[B₂O₃(s) ] = -1,273.5 kJ/mol
$\Delta$ H^$\circ$_f[B₅H₉(s) ] = 73.2 kJ/mol
$\Delta$ H^$\circ$_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

Pentaborane B5H9(s) Burns Vigorously in O2 to Give B2O3(s) and H2O(l)

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Pentaborane B₅H₉(s) Burns Vigorously in O₂ to Give B₂O₃(s) and H₂O(l)

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