<Li> 2B (s) + (3 / 2) O (g) → B O (s) </Li> <P> After the multiplication and reversing of the equations (and their enthalpy changes), the result is: </P> <Ul> <Li> B H (g) + 3O (g) → B O (s) + 3H O (g) (ΔH = - 2035 kJ / mol) </Li> <Li> 3H O (g) → 3H O (l) (ΔH = - 132 kJ / mol) </Li> <Li> 3H O (l) → 3H (g) + (3 / 2) O (g) (ΔH = 858 kJ / mol) </Li> <Li> 2B (s) + 3H (g) → B H (g) (ΔH = 36 kJ / mol) </Li> </Ul> <Li> B H (g) + 3O (g) → B O (s) + 3H O (g) (ΔH = - 2035 kJ / mol) </Li>

What is hess's law state its implications