Answer the following about converting between thermodynamic potentials, for 10 points each.
[10m] Helmholtz free energy is equal to internal energy minus the product of temperature and this quantity.
ANSWER: entropy [or S]
[10e] Adding the product of pressure and volume to Helmholtz free energy yields this other type of free energy. A reaction is spontaneous if and only if the change in this quantity from the reactants to the products is negative.
ANSWER: Gibbs free energy [or Gibbs energy; or G]
[10h] To instead obtain the grand potential from the Helmholtz free energy, one subtracts a set of terms each equal to the product of particle number and this conjugate variable of particle number, which is denoted by mu.
ANSWER: chemical potential
<Joseph Krol , Science - Chemistry - Physical>