Question

What happens when gypsum is heated at 373k give reaction and equation

Answer 1

The gypsum gets converted to Plaster of Paris at 373 K. Gypsum is plaster of paris. when it is heated it will melt. If heated dry, it'll probably produce water and whitish residue ( Colour of Calcium Sulphate).

Answer 2

when gypsum is heated at 373K it loses 3/2 moles of water to form plaster of Paris.

CaSO4.2H2O (heating at 373K) - CaSO4.1/2H2O + 3/2H2O