A biological reaction has a change of enthalpy of -125 kJ/mol and a change of entropy of -126 J/K mol.?

Calculate the Gibbs Energy and determine if the reaction is spontaneous. ?G=?H-T?S

my answer key says -86kJ/mol, but I don't know how they get this number

you're probably forgetting that one is kJ and the other J. There's a factor of 1000 in there.

The other common mistakes are using C degrees (you need K), and not being careful enough with your minus signs.
Say What ???
Ok ...multiply by 10 ...divide by 7 ..subtract the number you first thought of .lol

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