Question

When ice melts at $1^{o}C$:

• A. an increase in entropy
• B. a decrease in enthalpy
• C. a decrease in free energy
• D. process is spontaneous

Answer 1

Answer: (A), (C), (D)

The correct options are
A an increase in entropy
C a decrease in free energy
D process is spontaneous

When ice melts at $1^o$:
Solid converts into liquid so an increase in entropy happens and this process is spontaneous.
As process is spontaneous so $\Delta G=-ve$ at this point so free energy decreases.