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Any compound contains chemical energy that can be released when its chemical bonds are broken. Any substance that can be used as a fuel contains chemical energy. Examples of matter containing chemical energy include:

• Coal: Combustion reaction converts chemical energy into light and heat.
• Wood: Combustion reaction converts chemical energy into light and heat.
• Petroleum: Can be burned to release light and heat or changed into another form of chemical energy, such as gasoline.
• Chemical batteries: Store chemical energy to be changed into electricity.
• Biomass: Combustion reaction converts chemical energy into light and heat.
• Natural gas: Combustion reaction converts chemical energy into light and heat.
• Food: Digested to convert chemical energy into other forms of energy used by cells.
• Cold packs: Chemical energy is absorbed in a reaction.
• Propane: Burned to produce heat and light.
• Hot packs: Chemical reaction produces heat or thermal energy.
• Photosynthesis: Changes solar energy into chemical energy.
• Cellular respiration: A set of reactions that changes the chemical energy in glucose into chemical energy in ATP, a form our bodies can use.