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:
“You know, what I very well know, that I bought you. And I know, what perhaps you think I don’t know, you are now selling yourselves to somebody else; and I know, what you do not know, that I am buying another borough. May God’s curse light upon you all: may your houses be as open and common to all Excise Officers as your wifes and daughters were to me, when I stood for your scoundrel corporation.”
—Anthony Henley (d. 1745)
“Whilst all the land was ringed with bristling arms
And flames laid waste our world,
All that was left me was a little garden
And thou within it, my beloved, my comrade.”
—Stefan Zweig (18811942)