In an adiabatic process, the walls of the system prevent heat exchange, therefore, \(dq=0\;\;\rightarrow dU=dw\).
The internal energy variation can be calculated with:
if \(C_v\) remains constant,
The enthalpy change is calculated with:
Remember that in adiabatic processes the equations must be used:
where \(\gamma=\frac{C_p}{C_v}\)