Compounds of hydrogen and boron are remarkable, not only for their unusual bonding, but also for their reactivity. With the more reactive halogens, for example, diborane (B2H6) forms trihalides even at low temperatures:
B2H6(g) +6Cl2(g) →2BCl3(g) + 6HCl(g)
ΔHorxn = -755.4 kJ
Explain how much heat is released when the 694.4 kg diorama reacts?