A gas is characterised by the enthalpy H(S, p) = C_p T, where C_p is a constant (called heat capacity and defined in § 5.2), and by pV = NR T, where p is its pressure, V its volume, T its temperature and N the number of moles of gas. An adiabatic reversible compression brings the pressure from p₁ to p₂ where p₂ > p₁. The initial temperature is T₁. Determine the temperature T₂ at the end of the compression.