Solve the all parts of given question:
Question: A mixture of 2000 g of water and 240 g of ice is in an initial equilibrium state at 0.00°C. The mixture is then, in a reversible process, brought to a second equilibrium state where the water-ice ratio, by mass, is 1:4 at 0.00°C.
Part A: Calculate the entropy change of the system during this process. (The heat of fusion for water is 333 kJ/kg).
Part B: The system is then returned to the initial equilibrium state in an irreversible process (say, by using a Bunsen burner). Calculate the entropy change of the system during this process. (Unit: joules per kelvin, J/K, for both parts).
I need help to find the entropy change of the system during this process.