When a 3.80-g sample of liquid octane (c8h18) is burned in a bomb calorimeter, the temperature of the calorimeter rises by 27.3 °c. the heat capacity of the calorimeter, measured in a separate experiment, is 6.18 kj> °c. determine the δe for octane combustion in units of kj> mol octane?

Answer is:  the δe for octane combustion is -5112.42 kJ/mol.

Chemical reaction: C₈H₁₈ + 25/2O₂ → 8CO₂ + 9H₂O.

m(C₈H₁₈) = 3.80 g; mass of octane.

n(C₈H₁₈) = m(C₈H₁₈) ÷ M(C₈H₁₈).

n(C₈H₁₈) = 3.8 g ÷ 114 g/mol.

n(C₈H₁₈) = 0.033 mol; amount of octane.

cp= 6.18 kJ/°C, specific heat capacity of the bomb calorimeter.  

Qcal = ΔT · cp.  

Qcal = 27.3°C · 6.18 kJ/°C.  

Qcal = 168.71 kJ; amount of heat absorbed.  

ΔE = Qcal ÷ n(C₈H₁₈).

ΔE = 168.71 kJ ÷ 0.033 mol.

ΔE = 5112.42 kJ/mol.

c)red bank

explanation:

red bank is a borough in monmouth county, new jersey, incorporated in 1908 and located on the navesink river, the area's original transportation route to the ocean and other ports.

14 days is the half-life of phosphorus-32