Octane, C8H18, a primary constituent of gasoline, burns in air: C8H18(ℓ) + 12 1/2 O2(g) →...

Octane, C₈H₁₈, a primary constituent of gasoline, burns in air:

C₈H₁₈(ℓ) + 12 1/2 O₂(g) → 8 CO₂(g) + 9 H₂O(ℓ)

A 1.00-g sample of octane is burned in a constant volume calorimeter. The calorimeter is in an insulated container with 1.20 kg of water. The temperature of the water and the bomb rises from 25.00 °C (298.15 K) to 33.21 °C (306.36 K). The heat required to raise the bomb’s temperature (its heat capacity), C_bomb, is 837 J/K. The specific heat of water is 4.184 J/g∙K. What is the heat of combustion per gram of octane? What is the heat of combustion per mole of octane?

kJ/g

kJ/mol

Expert Solution

queen_honey_blossom answered 11 months ago

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