1) Petroleum is sometimes call sunshine because the energy released by burning theses fuels represents energy originally captured from sunlight by prehistoric green plants during photosynthesis.
2) Potential energy is stored energy like me sitting on a couch with spring and the couch waiting for me to get off when the spring makes kinetic energy. Kinetic energy is energy of motion, like when i get up and the spring is released.
3) When an energy releasing chemical reaction takes place, bonds break and react in atoms, and reorganize to form new bonds.
4) A molecule of butane has more potential energy based on its structural formula.
5) a) potential
b) potential
c) kinetic
d) potential
e) kinetic
6) Because energy was required to make the bonds and so it is also required to break the bonds.
7) a) exothermic
b) endothermic
c) exothermic
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