When gypsum (CaSO4 -2H2O) is heated to 433 K, it converts to the hemihydrate CaSO4 • H2O,...

When gypsum (CaSO4 -2H2O) is heated to 433 K, it converts to the hemihydrate CaSO4 • H2O, and at 463 K, it forms y-CaSO4. Calculate the % weight changes at 433 and 463 K, and sketch what you expect to see in a TGA curve.