adiabatic process

An adiabatic process is a thermodynamic process in which no heat is added to or removed ($q=0$) from the system while the pressure, volume, and temperature can still change. $\Delta U=-w$ (see first law of thermodynamics, pressure-volume work)

$q=0$ $\Delta U=\frac{3}{2}nR\Delta T$ $\Delta U=-w$