Write the expression showing relation between enthalpy change and internal energy change for gaseous phase reaction?

Question: Write the expression showing relation between enthalpy change and internal energy change for gaseous phase reaction? 

The expression showing the relation between enthalpy change and internal energy change for a gaseous phase reaction is:

ΔH = ΔU + PΔV

Where ΔH is the change in enthalpy, ΔU is the change in internal energy, P is the pressure, and ΔV is the change in volume. In a gaseous phase reaction, the pressure and volume can change significantly, and these changes must be taken into account when calculating the change in enthalpy. The relationship between enthalpy and internal energy is important in thermodynamics, as it allows us to calculate the amount of heat energy that is released or absorbed during a chemical reaction. By understanding the relationship between these two quantities, we can better understand the behavior of chemical reactions and the thermodynamic properties of gases.

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