When the heat of reaction is applied to 50 octane, the heat of reaction is -2407.43 KJ. Octane has a molar mass of 114.33.
It's important not to confuse octane with the octane number assigned to gasoline because octane is a hydrocarbon with an eight-atom chain. The antiknock characteristics of fuels are compared using the octane rating system, which uses a scale with 0 being pure n-heptane and 100 being pure 2,2,4-trimethylpentane (isooctane, an isomer of octane).
When a fuel is burnt in a mixture with air in the cylinder of an internal combustion engine, its capacity to withstand knocking is measured by its octane number, often known as its antiknock rating.
The liquid n-octane has the smell of gasoline and is colorless. Both less dense and insoluble in water as a result, floats on water. In order for modern engines to operate correctly, octane, a fuel additive, is required.
Octane weight is 50 g.
Octane's molecular weight is 114.33 g/mole.
We must first determine the octane molecular weight.
= 50/114.33g/mole.
=0.4373
Heat energy released by 2 moles of octane is -11018 KJ.
Octane releases 0.437 moles of heat energy, so
-11018/2 x s 0.437
=-2407.433
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