Each water molecule has 4 hydrogen bonds holding it in the solid phase. These are the bonds that are broken when the water sublimes (converts from solid to gas). Therefore, the H-bond energy is 11.9kcal/4 = 2.98 kcal/bond Solution Each water molecule has 4 hydrogen bonds holding it in the solid phase. These are the bonds that are broken when the water sublimes (converts from solid to gas). Therefore, the H-bond energy is 11.9kcal/4 = 2.98 kcal/bond.