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Energy of chemical reactions

Publisher Summary

This chapter focuses on the energy of chemical reactions. The energy of atoms and molecules in a chemical system is made up of kinetic energy and potential energy. The total energy of a chemical system is called the internal energy and is given the symbol U. The total amount of internal energy associated with a system is difficult to measure absolutely, but changes in energy can readily be determined. The change in internal energy is signified as ΔU. The unit of heat energy is the joule J, and the molar heat capacity of a system is measured in joules per mole Kelvin. A consideration of the internal energy of a chemical system involving several polyatomic molecules is difficult. To obtain information ...

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