Answer to Question #44067 in Physical Chemistry for Zeph

Question

1. What is the inverse square law and how does it relate to fire safety? Outline a factor other than the spread of heat where the inverse square law also impacts on fire safety in premises.
2. Discuss the properties of glass with respect to transmitted heat and the implications for glazing on escape routes
3. What are the two properties that a material must have for spontaneous heating to occur under certain conditions?
4. In order to initiate combustion in solids material, it is usually necessary to raise their temperature by means of external heat sources. 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.
5. List other chemical reactions that can result in heat being produced to such an extent that ignition may occur
6. A fire quite often follows a change to an industrial process. Give an example of such a change that could result in self heating occurring
7. Contact between two moving surfaces, or one moving surface and stationery one, can lead to the production of electrostatic charges. List the measures that can be taken to reduce the risk of a fire occurring as a result of a build-up of such charges
8. Friction is also a common source of ignition in industrial workplaces and is again associated with movement. Explain concisely the difference between friction and electrostatic charges as a source of ignition
9. List measures that may be taken to reduce the risk of a fire occurring as a result of the build-up of heat by friction