![]() enthalpy of solutionThe heat association with dissolving a particular solute in a particular solvent.The standard enthalpy of reaction occurs in a system when one mole of matter is transformed by a chemical reaction. The standard enthalpy of formation is the change in enthalpy that accompanies the formation of one mole of the compound from its elements.The standard state for a gas is the hypothetical state at 1 bar for liquids and solids, the pure substance at 1 bar for elements, the most stable allotrope of the element and for a substance in solution (solute), concentration at 1 M and 1 bar.It is used to calculate the material’s properties under different conditions and is denoted as H^\ominus_f. The standard state of a material is a reference point for the material’s thermodynamic state properties such as enthalpy, entropy, Gibbs free energy, etc. ![]()
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