Change in enthalpy is defined as:
Correct answer: B. The total energy change at constant pressure and temperature
- A. The change in heat content
- B. The total energy change at constant pressure and temperature
- C. The heat change at constant volume if ∆n=0
- D. Work done at constant pressure
Explanation
The change in enthalpy is defined as the total energy change at constant pressure and temperature.
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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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