One example of chemical potential energy is coal and another example is food that has been digested. Another kind of potential energy is elastic potential energy and some examples of that are springs...
Plants, for instance create food by the process of photosynthesis, that is probably one of the most studied chemical energy examples. Plants and trees absorb solar energy and use it to turn carbon...
Potential energy is the mass of an object times its height above ground. If you lift a 10 pound object 10 feet it has a potential energy of 100 pound-feet. The energy is released when it returns to...