1. The problem statement, all variables and given/known data Hi, I have the following task: We have two conformers and the difference in energy between them is aprox. 1 Kcal/mol. What is the Keq at room temperature vs. at -78°C? 2. Relevant equations Keq=e^(deltaG/(-R*T)) 3. The attempt at a solution I tried to solve the problem the following way: deltaG = R*T*ln(Keq) --> Keq=e^(deltaG/(-R*T)) T(room)=293.15K, T(-78°C)=195.15K R=8.313 J/(mol*K), DeltaG= 1 Kcal/mol= 4184 J/mol then I inserted the values and got Keq(room) = 0.18 and Keq(-78°C) = 0.08 which is apparently wrong. They told me that I used deltadeltaG instead of deltaG in the equation. Can somebody help me?