Acetylene, c2h2, has a standard enthalpy of formation, δh° = 226.7 kj/mol, and a standard entropy change for its formation from its elements, δs° = 58.8 j/k•mol. the standard free energy of formation of acetylene is kj/mol.

Explanation:

The given data is as follows.

      = 226.7 kJ/K mol,      

      = 58.8 J/mol =

         T = = (25 + 273) K = 298 K

Now, calculate the standard free energy of formation of acetylene () as follows.

                        = 226.7 - kJ/mol - 298 K \times 58.8 \times 10^{-3} kJ/K mol[/tex]

                        = 209.2 kJ/mol

Thus, we can conclude that the standard free energy of formation of acetylene is 209.2 kJ/mol.

the ratio of the conjugate base to the acid required to attain the desired ph.