Common Flames
In daily life, the vast majority of flames one encounters are those of organic compounds including wood, wax, fat, common plastics, propane, and gasoline. The constant-pressure adiabatic flame temperature of such substances in air is in a relatively narrow range around 1950 °C. This is because, in terms of stoichiometry, the combustion of an organic compound with n carbons involves breaking roughly 2n C–H bonds, n C–C bonds, and 1.5n O2 bonds to form roughly n CO2 molecules and n H2O molecules.
Because most combustion processes that happen naturally occur in the open air, there is nothing that confines the gas to a particular volume like the cylinder in an engine. As a result, these substances will burn at a constant pressure allowing the gas to expand during the process.
Read more about this topic: Adiabatic Flame Temperature
Famous quotes containing the words common and/or flames:
“We are the creatures of imagination, passion, and self- will, more than of reason or even of self-interest.... Even in the common transactions and daily intercourse of life, we are governed by whim, caprice, prejudice, or accident. The falling of a teacup puts us out of temper for the day; and a quarrel that commenced about the pattern of a gown may end only with our lives.”
—William Hazlitt (1778–1830)
“Kick up the fire, and let the flames break loose
To drive the shadows back;
Prolong the talk on this or that excuse....”
—Philip Larkin (1922–1986)