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At constant pressure, the heat absorbed or released in a reaction is equal to the change in:
- A Enthalpy
- B Entropy
- C Gibbs free energy
- D Activation energy
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At constant pressure, the heat absorbed or released in a chemical reaction is represented by the change in enthalpy, denoted as ΔH. Enthalpy is a thermodynamic function that accounts for the internal energy of a system and the work done by or on the system at constant pressure. The heat exchange in a reaction under constant pressure conditions is essentially the change in enthalpy.
