  Isooctane (C8H18; d= 0.692 g/mL) is used as the fuel during a test of a new automobile engine.How much energy (in kJ) is released by complete combustion of 11.9 gal of isooctane to gases(AH 5.44 x10° kJ/mol)? Enter your answer in scientific notation.rxnх 10kJ

Question help_outlineImage TranscriptioncloseIsooctane (C8H18; d= 0.692 g/mL) is used as the fuel during a test of a new automobile engine. How much energy (in kJ) is released by complete combustion of 11.9 gal of isooctane to gases (AH 5.44 x 10° kJ/mol)? Enter your answer in scientific notation. rxn х 10 kJ fullscreen
Step 1

The energy released in the combustion of a hydrocarbon in a particular reaction is calculated by multiplying the number of moles of the hydrocarbon with the enthalpy change of the combustion reaction of the hydrocarbon.

The density of a substance is the ratio of its mass and volume. It is a measure of mass per unit volume. It is given by expression (1), in which, d is the density, m is the mass, and V is the volume of the substance.

The number of moles of a species is calculated by expression (4), in which, n is the number of moles, m is the mass, and M is the molar mass of the species.

Step 2

The conversion factor for gal and mL units is,

1 gal = 3785.4 mL

The volume of isooctane can be converted into mL units as, help_outlineImage Transcriptionclose11.9 gal 11.9 galx3785.4 mL 1.0 gal = 4.5x104 mL fullscreen
Step 3

The mass of isooctane in the given reactio...

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