Combustion and fossil fuels Flashcards
Define combustion
The process of burning of substance in the presence of oxygen to produce heat and light
Rapid combustion
Large amount of heat and light is produced in a short time
Explosion
Sudden release of a large amount of heat and light
Spontaneous combustion
The substance beggins to burn on its own without the appliction of heat
When does complete combustion take place?
What is formed?
in presence of adequete amount of oxygen
Carbon di oxide , water heat and light
When does incomplete combustion take place ?
What is formed ?
in presence of inadequete amount of oxygen
Carbon mon oxide , water, soot heat and light
Name the necessary condition for combustion.
Presence of a supportor of combustion
Presence of a combustable substance
Attainmen tof ingition temperature.
Name the components of a soda acidextinguisher.
Sulphuric acid,Sodium hydrogen carbonate
Define fuel
any substance that is used to produce heat nad light
Basic Charactersitics of a fuel depends on ————-
Cost efficiency,availability , extent of pollution,calorific value , choice of fuel ( domestic od industrial
Calorific Value.
Calorific Value is the amount of heat produced in kilojoules when 1 gram of fuel is burned.
What is fuel efficiency of a machine?
The proportion of fuel that is converted into useful work bye a machine is called the fuel efficiency of a machine
Mention in order products produced uring refining of pertrol.
Lubricating oil Fuel oil disel Kerosine Petrol Petroleum gas
Characteristics of an Ideal fuel?
High calorific value,Ignition temperature must be low but well above room,moderate rate of combustion
fairly cheap and easily available, Safe to transport and handle,shoud not cause pollution when burned
Solid liquid and gas fuels
wood , charcol,kerosens petrol , natural gas petroleam gas
