B) Heptane, C7H16 is a hydrocarbon found in petrol. The equation for the combustion of heptane is:

C7H16 (l) + 11O2(g) → 7 CO2 (g) + 8 H2O (l)

H = -4817 kJ mol-1

Draw a simple energy diagram to show the combustion of heptane show clearly how the figure of - 4817 fits onto your diagram.​

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The molar mass of a substance is defined as the mass of 1 mol of that substance, expressed in grams per mole, and is equal to the mass of 6.022 × 10 23 atoms, molecules, or formula units of that substance.

It will appear as o2(g) as a reactant 

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Those are different gas lawshere is a brief description of themcharles's law states that volume and temperature are directly proportional to each other as long as pressure is held constant.  boyle's law asserts that pressure and volume are inversely proportional to each other at fixed temperature.gay-lussac's law introduces a direct proportionality between temperature and pressure as long as it is at a constant volume.    source: