Question

Which of the following processes would have a change in potential energy as shown below?
A- melting chocolate
B- boiling water
C- burning gasoline
D- frying bacon

Answer 1

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Potential energy is energy stored in an object.
Melting chocolate, boiling water and frying bacon are examples where you put energy IN
Burning gasoline is an example where you get energy OUT.
The gasoline has potential energy. This energy has the potential to do work. In this gas it's burning so it gives off heat. You can use this heat to do something (like melting chocolate or boiling water). So C is a decrease in potential energy.