Final answer:
To calculate the combustion energy for heptene per gram, you must use the enthalpy change of combustion (ΔHcomb), which is not provided. Once available, it is divided by the molar mass of heptene to find the energy in kJ/g.
Step-by-step explanation:
The question is asking to calculate the combustion energy for heptene, which is a different compound than heptane. For the purpose of giving a general approach since specific enthalpy values are not provided, the balanced combustion reaction for heptene (C7H14) would be:
C7H14(l) + 11O2(g) → 7CO2(g) + 7H2O(l)
To find the combustion energy per gram, you would need to know the enthalpy change of the combustion reaction (ΔHcomb) for one mole of heptene, typically in kJ/mol. Once you have this value, you divide it by the molar mass of heptene to get the energy per gram. Without the specific ΔHcomb value, we cannot provide an exact answer. Nonetheless, the process involves balancing the combustion reaction, finding the energy released, and converting it to a per gram basis.