Enthalpy is an expression for the:
Correct answer: A. Heat content
- A. Heat content
- B. Rate of reaction
- C. Internal energy
- D. Activation energy
Explanation
Total heat content of the system is called enthalpy. Enthalpy is a thermodynamic property of a system, denoted by the symbol H. It is defined as the sum of the internal energy of a system and the product of its pressure and volume. Enthalpy represents the total heat content of a system at constant pressure. Mathematically, enthalpy can be expressed as: H = U + PV Where: H = Enthalpy U = Internal energy of the system P = Pressure V = Volume
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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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