During the combustion of diesel fuel with a mass of 77 g, an amount of heat equal to 784 kcal

During the combustion of diesel fuel with a mass of 77 g, an amount of heat equal to 784 kcal was released. Determine the specific heat of combustion of the fuel.

Initial data: m (mass of burned diesel fuel) = 77 g = 0.077 kg; Q (released amount of heat during the combustion of diesel fuel) = 784 kcal.

1) Let’s translate the released amount of heat from kcal to J (1 kcal = 4186.8 J): Q = 784 * 4186.8 = 3282451.2 J.

2) Let us determine the specific heat of combustion of diesel fuel: q = Q / m = 3282451.2 / 0.077 ≈ 42.63 MJ.

Answer: According to the calculation, the specific heat of combustion of diesel fuel is 42.63 MJ.