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Chemistry LibreTexts

7: Energy and Chemical Processes

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  • Energy is a vital component of the world around us. Nearly every physical and chemical process, including all the chemical reactions discussed in previous chapters, occurs with a simultaneous energy change. In this chapter, we will explore the nature of energy and how energy and chemistry are related.

    • 7.1: Energy and Its Units
      Energy is the ability to do work. Heat is the transfer of energy due to temperature differences. Energy and heat are expressed in units of joules.
    • 7.2: Heat
      Heat transfer is related to temperature change. Heat is equal to the product of the mass, the change in temperature, and a proportionality constant called the specific heat.
    • 7.3: Phase Changes
      There is an energy change associated with any phase change. There is an energy change associated with any phase change.
    • 7.4: Bond Energies & Chemical Reactions
      Atoms are held together by a certain amount of energy called bond energy. Chemical processes are labeled as exothermic or endothermic based on whether they give off or absorb energy, respectively.
    • 7.5: The Energy of Biochemical Reactions
      Energy to power the human body comes from chemical reactions.
    • 7.E: Energy and Chemical Processes (Exercises)
      Problems and Solutions to accompany the chapter.
    • 7.S: Energy and Chemical Processes (Summary)
      To ensure that you understand the material in this chapter, you should review the meanings of the following bold terms in the following summary and ask yourself how they relate to the topics in the chapter.