Answer to Question #44381 in Physical Chemistry for Zeph

Question

a. What are two properties that a material must have for spontaneous heating to occur under certain conditions

b. in order to initiate combustion in solids materials, it is usually necessary to raise their temperature by means of an external heat source. Under certain conditions, however some materials may generate the necessary heat internally. Give two examples of materials that can exhibit this phenomenon. In each case state how internal heating arises and outline the precautions that should be taken when they are stored to prevent combustion occurring.