A protein undergoes reversible thermal denaturation from its initial state N to denatured state D according to N <=> D . At 60ºC, the concentrations of both N and D are equal at equilibrium, and the standard enthalpy change of denaturation is 666 kJ mol -1 . The standard entropy change ( S° in kJ K -1 mol -1 ) of the protein upon denaturation at 60ºC is closest to

1. A. 2.0
2. B. 2000.0
3. C. 333.0
4. D. 11.1

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