A thermal energy of 10860 kilojoules is produced by burning two moles of octane.
The thermal energy ([tex]H[/tex]) released by octane, in kilojoules, is the product of amount of moles ([tex]n[/tex]) and enthalpy of combustion ([tex]h[/tex]), in kilojoules per mole:
[tex]H = n\cdot h[/tex] (1)
If we know that [tex]n = 2\,mol[/tex] and [tex]h = 5430\,\frac{kJ}{mol}[/tex], then the thermal energy of octane is:
[tex]H = (2\,mol) \cdot \left(5430\,\frac{kJ}{mol} \right)[/tex]
[tex]H = 10860\,kJ[/tex]
A thermal energy of 10860 kilojoules is produced by burning two moles of octane. [tex]\blacksquare[/tex]
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