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Introduction The study of energy is an important component chemists use to study chemistry. Most of the energy used in society comes from chemical reactions, which include the combustion of fossil fuels. Another example of the practical uses of this theory is when gasoline is combusted in a car engine, the engine block becomes hot and the car's pistons move (Brain, 2007). This example demonstrates two ways heat can be transferred, which are through heat(temperature change) or work. Since a significant amount of work is not produced in chemical reactions, most of the energy comes in the form of heat (Jones, 2007). This component of chemistry is known as thermochemistry (Jones, 2007). During a chemical reaction, chemical bonds are created and destroyed, which means energy can be either released or absorbed. With constant pressure, the change in energy of a reaction is known as the heat of reaction or enthalpy...

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