Diborane, B₂H₆, is a gas at 744.0 torr and 120.0 °C. It reacts violently with O₂(g), yielding B₂O₃(s) and water vapor. The reaction is so energetic that it once was considered as a possible rocket fuel. What is ΔH for the reaction of 1 mol B₂H₆ if the reaction of 2.329 L of B₂H₆ under the above conditions yields 143.9 kJ heat at constant pressure?