Published February 25, 2013. It's a wrap on the Oscars! Django Unchained was the night's first winner, scoring a Best Supporting Actor prize for Christoph Waltz. The film also earned writer/director Quentin Tarantino a nod for Best Original Screenplay.
Spontaneous combustion. Spontaneous combustion or spontaneous ignition is a type of combustion which 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, autoignition.
Key Concepts. 1  Heat of Combustion of a substance is the heat liberated when 1 mole of the substance undergoes complete combustion with oxygen at constant pressure. 2  Combustion is always exothermic, the enthalpy change for the reaction is negative, Î´H is negative. Combustion is always exothermic, the enthalpy change for the reaction is negative, Î´H is negative. 2  By definition, the heat of combustion is minus the enthalpy change for the combustion reaction, ie, -Î´ reaction H. 3  By definition, the heat of combustion is a positive value.