The activation energy for the oxidation of iron in a rusting reaction can vary depending on the specific conditions and the presence of any catalysts. However, in general, the activation energy for the oxidation of iron Fe to form iron III oxide Fe2O3 in the presence of water and oxygen the rusting process is approximately 80 kJ/mol.It is important to note that the presence of saline water can accelerate the rusting process due to the increased conductivity and availability of electrolytes, which can facilitate the electron transfer reactions involved in the oxidation process. This may result in a lower activation energy under these specific conditions. However, without more detailed information on the specific reaction conditions and system, it is difficult to provide a more precise value for the activation energy.