Statement: The thermodynamics functions which determines the spontaneity of a process is the free energy. For a process to be spontaneous, the change in free energy must be negative.
Explanation:The change in free energy is related to the change in enthalpy and change in entropy. the change in entropy for a process must be always positive if it is spontaneous.
A. If both (A) and (R) are correct and (R) is the correct explanation for (A).
B. If both (A) and (R) are correct but (R) is not the correct explanation for (A).
C. If (A) is correct but (R) is incorrect
D. If (A) is incorrect but (R) is correct.