Answer:
It is a chemical change
Explanation:
the reason is because the will not be able to materialize back into it's original form.
The
combustion of heptane (C7H16) in oxygen spontaneously occurs. The products of
the reaction are carbon dioxide and water vapor. The balanced chemical equation
is 7H16 + 11O2 → 7CO2 + 8H2O H
= –2877.5 kJ.
Answer:
All energy is made by the sun because without the sun there would be no humans to produce other energy
