CCCCC(C)/C=C/C(O)=C1\C(=O)O/C(=C\C(=O)O)C1=O
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?