(a) Give the formula indicating the relationship between entropy, free energy and enthalpy changes of a system. (b) For each of the following, state whether entropy change is positive, negative or zero. (i) H\(_2\)O\(_{(g)}\) -> H\(_2\)O\(_{(g)}\) (ii) Cl\(_{2(g)}\) ---> 2CI\(_{(g)}\) (iii) HCI\(_{(g)}\) -> HCl\(_{(g)}\)
Explanation
(a) \(\Delta\)C = \(\Delta\)H - T\(\Delta\)S (free energy) (enthalpy) (Temperature x Entropy) (b)(i) Entropy is positive (ii) Entropy is positive (iii) Entropy is negative.
