Consider the following volume-temperature (V–T) diagram for the expansion of \( 5 \, \text{moles} \) of an ideal monoatomic gas.
Considering only P–V work is involved, the total change in enthalpy (in Joule) for the transformation of state in the sequence \( X \to Y \to Z \) is ______.
[Use the given data: Molar heat capacity of the gas for the given temperature range, \( C_{V,m} = 12 \, \text{J K}^{-1} \, \text{mol}^{-1} \) and gas constant, \( R = 8.3 \, \text{J K}^{-1} \, \text{mol}^{-1} \)]
