What is the relationship between enthalpy change ($\Delta H$) and internal energy change ($\Delta U$) for a gaseous reaction?
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Question

What is the relationship between enthalpy change ($\Delta H$) and internal energy change ($\Delta U$) for a gaseous reaction?

Accepted Answer

The correct relationship for a chemical reaction involving gases at constant temperature and pressure is given by $\Delta H = \Delta U + \Delta ng RT$, where $\Delta ng$ is the difference between moles of gaseous products and gaseous reactants.

Chemical Thermodynamics

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