Chapter 5, Problem 5.60E

Interpretation Introduction

Interpretation:

The values of $\Delta G$ and $K$ for the given reaction are to be calculated.

Concept introduction:

The amino acids have an acidic group $\left(\text{COOH}\right)$ and a basic group $\left({\text{NH}}_{\text{2}}\right)$ in its basic structure. They exist in Zwitter ion form that is they have positive as well as negative charge in the structure. Isoelectric point is the pH at which the amino acid is neutral. This is the point at which amino acid does not migrate when placed in an electric field. Also, $\Delta G$ is related to $\Delta H$ and $\Delta S$ by the relation given below.

$\Delta G=\Delta H-T\Delta S$

In the above relation, $\Delta G$ is the free energy of reaction, $\Delta H$ is the enthalpy of reaction, $\Delta S$ is the entropy of reaction and $T$ is the temperature.