Pentaborane-9 (BH) is a colorless, highly reactive liquid that will burst into flames when exposed to oxygen. The reaction is 2B,H,()+ 120,(e)- SB,0,(s) + 9H₂O(/) Calculate the kilojoules of heat released per gram of the compound reacted with oxygen. The standard enthalpy of formations of B, H, (!), kJ B,0, (s), 0, (e), and H₂O () are 73.2 1273.5 and-285.8 mol kJ g B, H, released kJ mol kJ 0 mol kJ mol , respectively. Round your answer to 1 decimal place.

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Pentaborane-9 (B,H,) is a colorless, highly reactive liquid that will burst into flames when exposed to oxygen. The reaction is
2B,H,()+ 120,(e)- SB₂0,()+ 9H₂0 (1)
Calculate the kilojoules of heat released per gram of the compound reacted with oxygen. The standard enthalpy of formations of B, H, (!),
kJ
B,0, (s), O, (g), and H₂O () are 73.2 -
-1273.5
and-285.8
mol
kJ
gB₂H,
released
0.2
X
kJ
mol
0
kJ
mol
kJ
mol
, respectively. Round your answer to 1 decimal place.
Transcribed Image Text:Pentaborane-9 (B,H,) is a colorless, highly reactive liquid that will burst into flames when exposed to oxygen. The reaction is 2B,H,()+ 120,(e)- SB₂0,()+ 9H₂0 (1) Calculate the kilojoules of heat released per gram of the compound reacted with oxygen. The standard enthalpy of formations of B, H, (!), kJ B,0, (s), O, (g), and H₂O () are 73.2 - -1273.5 and-285.8 mol kJ gB₂H, released 0.2 X kJ mol 0 kJ mol kJ mol , respectively. Round your answer to 1 decimal place.
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