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