Problem- For double helix formation, [delta]G can be measured to be -54 kJ/mol (-13 kcal/mol) at pH 7.0 in 1 M NaCl 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.
I know how to calculate [delta]S but do not understand whether my answer applies as the surroundings or system and how to obtain the second answer.
Determine the solution for the above problem express your work in detail