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\n\nCalculate Delta H using Thermochemical Equations Calculator
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Enthalpy Change of Reaction
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What is Enthalpy Change of Reaction (ΔH°rxn°)?
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Enthalpy change of reaction, symbolized as ΔH°rxn°, is a fundamental concept in thermochemistry that quantifies the heat absorbed or released during a chemical reaction conducted under standard conditions. Standard conditions typically refer to a pressure of 1 bar (100,000 Pa) and a specified temperature, most commonly 298.15 K (25°C).
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This value is crucial for understanding the energetic profile of a chemical process. When ΔH°rxn° is negative, the reaction is exothermic, meaning it releases heat into the surroundings. Conversely, a positive ΔH°rxn° indicates an endothermic reaction, which absorbs heat from the surroundings.
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Chemists and chemical engineers use this value to predict reaction feasibility, calculate