If you calculated the heat of combustion of biodiese! using a bomb calorimeter,

Question

If you calculated the heat of combustion of biodiese! using a bomb calorimeter, answer the following questmn' Compare the heat of combustion of blo&esel with heptane. Why does heptane have a larger heat of combustion? The heat of combustmn of heptane is 45 lq/g. (Hint: In answer- mg this question, it may be helpful to compare the molecular formulas of blodiesel and heptane). If you calculated the heat of combustion of biodiese! using a bomb calorimeter, answer the following questmn' Compare the heat of combustion of blo&esel with heptane. Why does heptane have a larger heat of combustion? The heat of combustmn of heptane is 45 lq/g. (Hint: In answer- mg this question, it may be helpful to compare the molecular formulas of blodiesel and heptane). If you calculated the heat of combustion of biodiese! using a bomb calorimeter, answer the following questmn' Compare the heat of combustion of blo&esel with heptane. Why does heptane have a larger heat of combustion? The heat of combustmn of heptane is 45 lq/g. (Hint: In answer- mg this question, it may be helpful to compare the molecular formulas of blodiesel and heptane).

Explanation / Answer

heat of combution of biodiesel = 38.48 MJ/Kg=38.48J/g

heat of combution of heptane = 45lq/g

2C7H19+ O2 ----> 14CO2 + 19H2O

Heptane is a alkane.

All carbon present in heptane is burn on combution & give CO2 so it has large geat of combution.

Biodiesel is a ester. All carbon present in it is not burn on combution. So it has low heat of combution as compared heptane.

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