Question

A negative slope in a Van't Hoff plot indicates that the change in this quantity is positive. This quantity is constant in throttling processes, including one named for Joule and Thomson where gasses are forced through a porous plug. This quantity is equal to the internal energy plus pressure times volume. Because it is a state function by (*) Hess’ law, (10[1])the total change of this quantity in a reaction only depends on initial and final states. This quantity minus temperature times entropy gives Gibbs free energy. This quantity is increased in endothermic reactions. For 10 points, name this thermodynamic quantity symbolized H, that is the total heat content within a system. ■END■

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