Chemistry · THERMODYNAMICS

For a chemical reaction involving ideal gases at constant temperature and pressure, the relation between enthalpy change (\( \Delta H \)) and internal energy change (\( \Delta U \)) is:

1. \( \Delta H = \Delta U - \Delta n_g RT \)
2. \( \Delta H = \Delta U + \Delta n_g RT \)
3. \( \Delta U = \Delta H + \Delta n_g RT \)
4. \( \Delta H = \Delta U + \frac{\Delta n_g}{RT} \)