When is there a need to determine G?
A. When H > 0 and S < 0
B. When H > 0 and S = 0
C. When H > 0 and S > 0
D. When H = 0 and S < 0
A. When H > 0 and S < 0
B. When H > 0 and S = 0
C. When H > 0 and S > 0
D. When H = 0 and S < 0