For transformations occurring at constant pressure, it is equal to the change in the internal energy of the system, and the product of temperature and change in entropy subtracted from change in it is the change in the Gibbs energy of a reaction.
Vertical lines on Mollier diagrams display transformations in which this quantity is unchanged. This quantity remains constant for a system in a throttling process. The van't Hoff equation states that the derivative of the natural log of the equilibrium constant with respect to inverse temperature is equal to negative change in this quantity divided by the ideal gas constant. For transformations occurring at constant pressure, it is equal to the change in the internal energy of the system, and the product of temperature and change in entropy subtracted from change in it is the change in the Gibbs energy of a reaction. For 10 points, identify this thermodynamic quantity symbolized H.
Vertical lines on Mollier diagrams display transformations in which this quantity is unchanged.
{enthalpy} [prompt on {H}]