Enthalpy change is related to the type of chemical reaction. If it is an irreversible reaction, the change of temperature and pressure will not affect the progress of the reaction. According to Goose's law, the enthalpy change has nothing to do with the process, but the temperature and pressure change, and the enthalpy changes.

But in the reversible reaction, the enthalpy change of the reaction is related to this reflected K. If the reaction is more thorough, the enthalpy change of the reaction will be closer to △H, otherwise it will be less than △H, and the change of temperature will inevitably affect K. Therefore, the enthalpy change of the reversible reaction will change with the temperature, while the pressure depends on the coefficient of gases on both sides of the reaction. If left = right, the enthalpy change will not change with pressure, otherwise it will.