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Enthalpy is the total heat content of a system. The formula definition is the internal energy plus the product of pressure and volume: H = U + P V where: H is enthalpy, U is internal energy, P is

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Although Δ U is a useful quantity, for chemists the change enthalpy ( Δ H) is more relevant. However, we can convert Δ U to Δ H using Eqn. 1, if we know the change in the number of moles of gas ( Δ n) in the reaction

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An online enthalpy calculator is specially designed to calculate exact amount of enthalpy generated in a thermodynamic system. With the help of this tool, you can use either enthalpy

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The enthalpy of solution can expressed as the sum of enthalpy changes for each step: (1) Δ H s o l u t i o n = Δ H 1 + Δ H 2 + Δ H 3. So the enthalpy of solution can either be