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  2. Heat of combustion - Wikipedia

    en.wikipedia.org/wiki/Heat_of_combustion

    That is, the heat of combustion, ΔH° comb, is the heat of reaction of the following process: C c H h N n O o (std.) + (c + h ⁄ 4 - o ⁄ 2) O 2 (g) → c CO 2 (g) + h ⁄ 2 H 2 O (l) + n ⁄ 2 N 2 (g) Chlorine and sulfur are not quite standardized; they are usually assumed to convert to hydrogen chloride gas and SO 2 or SO

  3. Adiabatic flame temperature - Wikipedia

    en.wikipedia.org/wiki/Adiabatic_flame_temperature

    The constant volume adiabatic flame temperature is the temperature that results from a complete combustion process that occurs without any work, heat transfer or changes in kinetic or potential energy. Its temperature is higher than in the constant pressure process because no energy is utilized to change the volume of the system (i.e., generate ...

  4. Combustion - Wikipedia

    en.wikipedia.org/wiki/Combustion

    Spontaneous combustion is a type of combustion that occurs by self-heating (increase in temperature due to exothermic internal reactions), followed by thermal runaway (self-heating which rapidly accelerates to high temperatures) and finally, ignition. For example, phosphorus self-ignites at room temperature without the application of heat.

  5. Adiabatic process - Wikipedia

    en.wikipedia.org/wiki/Adiabatic_process

    Some chemical and physical processes occur too rapidly for energy to enter or leave the system as heat, allowing a convenient "adiabatic approximation". [3] For example, the adiabatic flame temperature uses this approximation to calculate the upper limit of flame temperature by assuming combustion loses no heat to its surroundings.

  6. Otto cycle - Wikipedia

    en.wikipedia.org/wiki/Otto_cycle

    Through the combustion of fuel, heat is added in a constant volume (isochoric process) process (2-3), followed by an adiabatic expansion process power (3-4 and colored red) stroke. The cycle is closed by the exhaust (4-0 and colored blue ) stroke, characterized by isochoric cooling and isobaric compression processes.

  7. Flame - Wikipedia

    en.wikipedia.org/wiki/Flame

    Temperature of atmosphere links to adiabatic flame temperature (i.e., heat will transfer to a cooler atmosphere more quickly) How stoichiometric the combustion process is (a 1:1 stoichiometricity) assuming no dissociation will have the highest flame temperature; excess air/oxygen will lower it as will lack of air/oxygen

  8. Exothermic reaction - Wikipedia

    en.wikipedia.org/wiki/Exothermic_reaction

    The heat release and corresponding energy change, ΔH, of a combustion reaction can be measured particularly accurately. The measured heat energy released in an exothermic reaction is converted to Δ H ⚬ in Joule per mole (formerly cal/mol ).

  9. Activation energy - Wikipedia

    en.wikipedia.org/wiki/Activation_energy

    The blue flame sustains itself after the sparks stop because the continued combustion of the flame is now energetically favorable. In the Arrhenius model of reaction rates, activation energy is the minimum amount of energy that must be available to reactants for a chemical reaction to occur. [ 1 ]