What is the formula for ΔH?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
The formula for change in enthalpy is ΔH = ΔE + PΔV at constant pressure, or ΔH = H(products) - H(reactants) for chemical reactions. For processes at constant pressure with only PV work, ΔH = (heat absorbed). Enthalpy change indicates whether a reaction is exothermic (ΔH < 0) or endothermic (ΔH > 0).
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