Question

Q4. How long will it take on average to break a Van der Waals bond (-0.01 eV), hydrogen bond (~0.3 eV) and a covalent bond (~1 eV) at room temperature? Remember that spontaneous depends on whether or not AG AH TAS <0 and can be controlled by temperature and/or concentrations of reactants/products. For speed, of a reaction you need to consider the activation barrier, which can be controlled by temperature and/or catalysts. You can assume that the bond strength is your activation barrier, 20 points E/KT T0.025 eV at room temperature. break'vibrations

Answer 1

For Van der waals bond , E = 0.01 eV

So, t_break = t_vibrations x e^E/kT =t_vibrations e^0.01/0.025 =t_vibrations e^0.4 = 1.492 x t_vibrations

For, hydrogen bond , t_break = t_vibrations x e^E/kT =t_vibrations e^0.3/0.025 =t_vibrations e¹² =162754.79 x t_vibrations

For covalent bond, t_break = t_vibrations x e^E/kT =t_vibrations e^1/0.025 =t_vibrations e⁴⁰ =(2.35 x 10¹⁷ ) x t_vibrations