How is plaster of paris obtained what reaction are involved in the setting of plaster of paris?

How is plaster of paris obtained what reaction are involved in the set

1.	How is plaster of paris obtained what reaction are involved in the setting of plaster of paris?
Answer» it is OBTAINED when GYPSUM is HEATED at 373°k CaSo4.1/2H2O----------CaSo4.2H2O+3/2H2O