[fender1289]

This is the equilibrium for the unfolding/folding of a protein at high temperatures.
Folded<-->Unfolded
For a given sample,
At 57°C, 50% of the sample is folded.
at 64°C, 90% of the sample is unfolded.

(A)   Calculate ΔH° of unfolding. (Assume ΔH and ΔS remain constant through the temperature range under consideration.)
(C)   Calculate ΔS° of unfolding

Not sure where to start here. I think this will have something to do with the number of available configurations for the protein, i.e. 2^n  where n is the number of protein molecules.

∆S=Kb ln(Ω1/Ω2)? I just need some help on where to start with this one. Thanks.

[Yggdrasil]

A good starting point is to calculate the equilibrium constant for folding at the two temperatures, then relate that to the change in free energy of folding (ΔG).