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Chemistry LibreTexts

Topic D: Thermochemistry

  • Page ID
    169988
  • Learning Objectives

    WHAT YOU SHOULD BE ABLE TO DO WHEN YOU HAVE FINISHED THIS TOPIC:

    1. Know the meaning of heat and work, and their relationship to energy (the First Law of Thermodynamics).
    2. Relate temperature changes and changes of state to the corresponding amounts of heat, using specific heats, heats of fusion, and heats of vaporization.
    3. Use standard calorimetric data (temperatures, masses, and specific heats) to calculate ΔE and ΔH for a reaction.
    4. Interconvert ΔE and ΔH for a reaction, and calculate the pressure-volume work that occurs under constant-pressure conditions.
    5. Calculate the heat produced by a reaction under constant-pressure or constant-volume conditions, given the masses of reactants and either ΔE or ΔH for the reaction.
    6. Understand the meaning of enthalpy of formation (ΔHf) and use enthalpies of formation to calculate ΔH for a reaction.
    7. Use Hess’s Law to calculate ΔH for a reaction, given appropriate ΔH values for other reactions.
    8. Understand the relationship between changes in chemical potential energy and the energy of a reaction.

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