This quantity is conserved in an ideal Hampson–Linde cycle, which is used in the liquefaction of gases. At a constant value of this quantity, hydrogen, helium, and neon warm upon expansion because they have very small inversion temperatures. The differential for this quantity is equal to “T dS + V dp” when particle number is held constant. Throttling processes conserve this quantity via the Joule–Thomson effect. In the thermodynamic square, this quantity is the only non-energy potential. Along with energy, the Born–Haber cycle calculates a “lattice” version of this quantity from Hess’s law. (-5[1])This quantity, (-5[1])equal to the sum of the internal energy (10[1])plus pressure times volume, is negative for exothermic processes. (10[3]-5[2])For 10 points, name this state function denoted H. (10[1])■END■ (10[2]0[1])