It is desired to find the cetane number of a fuel oil that has a density of and a midpoint boiling temperature of 229°C.When tested in the standard test engine, the fuel is found to have the same...

It is desired to find the cetane number of a fuel oil that has a density of and a midpoint boiling temperature of 229°C.When tested in the standard test engine, the fuel is found to have the same ignition characteristics as a mixture of 23% hexadecane and 77% heptamethylnonane.

Calculate:

(a) Cetane number of fuel.

(b) Percent error if cetane index is used to approximate the cetane number. [%]