The thermal energy at constant pressure is called:
Correct answer: A. Enthalpy
- A. Enthalpy
- B. Internal energy
- C. Heat capacity
- D. work done
Explanation
Enthalpy is defined as the sum of the internal energy of a system and the product of its pressure and volume. It is specifically used to describe the thermal energy of a system at constant pressure. Enthalpy change is related to the heat transfer occurring at constant pressure, making it the appropriate term for thermal energy under these conditions.
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About Thermochemistry and Energetics of Chemical Reactions
Thermochemistry measures energy changes in chemical reactions and distinguishes exothermic from endothermic processes. Work covers systems, surroundings and state functions, internal energy, the first law of thermodynamics, enthalpy and Hess's law, including the sign conventions used when heat enters or leaves a system.
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