Final answer:
The Law of Conservation of Energy states that energy cannot be created or destroyed during a chemical reaction but can be transferred between types of energy.
Step-by-step explanation:
The thermochemical law that states 'Energy cannot be created or destroyed during a chemical reaction but can be transferred between types of energy' is known as the Law of Conservation of Energy.
According to this law, the total energy before a chemical reaction must be equal to the total energy after the reaction. This means that energy may change form, such as from potential energy to kinetic energy or vice versa, but the overall amount of energy remains constant.
For example, in the combustion of gasoline, chemical potential energy is converted into thermal energy and kinetic energy as the gasoline is burned.
Learn more about Thermochemical law