Pentaborane- 9,B5H9, is a colorless, highly reactive liquid that will burst into flame or even explode when exposed to oxygen. The reaction is: 2B5H9(l)+12O2(g)5B2O3(s)+9H2O(1) a) Calculate the kilojoules of heat released per gram of the compound reacted with oxygen. b) Calculate Grxn for the balanced reaction at standard conditions. The change in entropy for the reaction (Srxn) is 1924J/K