Why kerosine doesnot ignite as readily as petrol?
It is due to difference in their flash point values : The flash point of a chemical is the lowest temperature where it will evaporate enough fluid to form a combustible concentration of gas. The flash point is an indication of how easy a chemical may burn. Materials with higher flash points are less flammable or hazardous than chemicals with lower flash points. Fuels and their flash points at atmospheric pressure can be found in the table below Fuel Flash Point (oF) Acetaldehyde -36 Acetone 0 Benzene 12 Carbon Disulfide -22 Diesel Fuel (1-D) 100 Diesel Fuel (2-D) 125 Diesel Fuel (4-D) 130 Ethyl Alcohol 55 Fuels Oil No.1 100 – 162 Fuels Oil No.2 126 – 204 Fuels Oil No.4 142 – 240 Fuels Oil No.5 Lite 156 – 336 Fuels Oil No.5 Heavy 160 – 250 Fuels Oil No.6 150 Gasoline -45 Gear oil 375 – 580 Iso-Butane -117 Iso-Pentane less than -60 Iso-Octane 10 Kerosine 100-162 Methyl Alcohol 52 Motor oil 420 – 485 n-Butane -76 n-Pentane less than -40 n-Hexane -7 n-Heptane 25 n-Octane 56 Naphthalene 174
