The hydrogen bond is called abond but is really a strong intermolecular forces or attractions, it being the strongest of this type of inter molecular attraction or "bond". Covalent bonds are the strongest in the general list of "real or accepted bond terminology", in a covalent bond the intra molelecular sharing of an electron between two participating nuclei of roughly the same electronegativity. What experimental methods is the author Mathfriend eluding to...if a test or experiment is assumed, then the experiment should be defined as well.
The Hydorgen bond is the weakest of all bonds, the covalent bond is the strongest of the two bonds, as is verified by experimental methods.
A bomb calorimeter is an instrument used to determine the enthalpy of formation to determine the energy required to form a hydrogen bond or a covalent bond. Please refer to the URL for a brief explanation of the enthalpy of formation of a hydrogen and a covalent bond.
http://74.125.95.132/search?q=cache:AV-9wHH_2l4J:www.geocities.com/llwuyy/H-Bond.doc+experiment+in+which+covalent+bond+strength+is+determined%3F&hl=en&ct=clnk&cd=2&gl=ushttp://
A bomb calorimeter is an instrument used to determine the enthalpy of formation to determine the energy required to form a hydrogen bond or a covalent bond. Please refer to the URL for a brief explanation of the enthalpy of formation of a hydrogen and a covalent bond.
http://74.125.95.132/search?q=cache:AV-9wHH_2l4J:www.geocities.com/llwuyy/H-Bond.doc+experiment+in+which+covalent+bond+strength+is+determined%3F&hl=en&ct=clnk&cd=2&gl=ushttp://