1990 WAEC Chemistry Theory (a) Give the formula indicating the relationship between entropy, free energy and enthalpy changes of...

(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\(_{(g)}\)

(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.

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