Question: For double helix formation, ?G can be measured to be -54 kJ/mol (-13 kcal/mol) at pH 7.0 in 1 M at 25 degrees C (298 K). The heat released indicates an enthalpy change of -251 kJ/mol (-60 kcal/mol). For this process, calculate the entropy change for the system and the entropy change for the surroundings.